New Year – New Beginnings – New Hopes

New Year is the time to look forward as well as back at what we have come through – the good and the not so good.

January and Janus

The word January comes from the Roman divinity, Janus with 2 heads – one which looks forward and one which looks back.



Stock Taking

It is a time we pause, take stock to march forward.

In Animals too

It is like the time when the molting snake sheds its old skin, the past and wriggles out with a new skin to the next phase out its life.


It is like how the American eagle sheds its old feathers and beak, gains new ones for its next phase of life.

This shedding of the past and adopting the new is not just to humans and calendars but to animals too as we see here.

In the Indian ethos we have festivals such as Lohri in Punjab where the old articles are burnt in the bonfire. We see the same practice in Deep South in Tamil Nadu where the old things are discarded in the bon fire during Bhogi.


Ringing out the Old and Ringing in the New

This is one way of symbolically ringing out the old and ringing in the new. Be it the temple bells or church bells symbolize this ringing out the old and ringing in of the new.

Change through Celebration

So New Year is now just a calendar but also harbinger of change. Change happens through a revolution which is generally violent. Change can happen through celebration.

So let us welcome this New Year, this Change, with Celebration.


How calculus was appropriated from India into Europe? – Dr. Bhaskar Kamble

The development of the infinitesimal calculus is considered to be a watershed event in the history of science and mathematics. Its importance in the natural sciences cannot be overestimated. Among the people credited for its invention are John Wallis (1616-1703 CE), Isaac Newton (1642-1727 CE), and Gottfried Leibniz (1646-1716 CE).

Very roughly speaking, calculus handles those problems where the rate at which ‘something’ is increasing is itself changing in time. Simple examples can include the case where the speed (the rate at which the distance is increasing) is changing in time, or the case where the acceleration (the rate at which the speed is changing in time) is changing in time. Together with Newton’s three laws of motion, which are physical in content, it offers a powerful tool to mathematically describe physical phenomena.

However, the standard story of calculus being developed in Europe independently by Newton and Leibniz, which is so universally accepted today, may well be in need of a major revision. Just like the concept of zero and the decimal number system originated in India, it is now well known that the concept of calculus also originated in India three centuries before it first appeared in Europe [1,2]. There is strong circumstantial evidence to suggest that these ideas and concepts were systematically appropriated by the church in Europe at the end of the 16th century and subsequently passed off as a European invention.

The earliest notion of calculus, specifically differential calculus, is to be found in the notion of tatkalika gati (Sanskrit: instantaneous velocity), of Bhaskaracharya (1114-1185 CE), in his monumental work Siddhanta Shiromani. In this text, he explicitly demonstrates and makes use of the relation

which is a standard result of differential calculus, to determine the instantaneous velocity of a planet. He also states one of the most important results of differential calculus – that the derivative vanishes at the points of minima or maxima, and also states what is today known as the Rolle’s theorem in analysis/calculus [2].

The tradition of mathematics in India has a long and hoary past, with several shining names such as Aryabhata, Bhaskara I, Bhaskaracharya, Brahmagupta, Varahamihira, and so on. The schools started by several of these mathematicians would constantly develop and improve upon the discoveries of the earlier mathematicians, and come up with significant new results in the process. The most sophisticated insights and developments undoubtedly come from the work of what is known as the Kerala school of mathematics, which was extant from 1300-1600 CE. They wrote commentaries on the works of earlier mathematicians such as Aryabhata and Bhaskara, and made important discoveries in what is known today as calculus. That these mathematicians developed calculus 300 hundred years before Newton and Leibniz did is obvious [1,2], but what is more interesting is how and why their work was hauled off to Europe, plagiarized, and passed off as a European invention. In this post I will try to shed light on how this occurred.

Till the 15th – 16th centuries, it is important to remember that the church dominated all spheres of life in Europe. Central to its aims was the establishment of Christianity throughout the world and destroy all ‘pagan’ and ‘heathen’ cultures in the process. The genocide of Red Indians in the Americas, or of aborigines in Australia, or Hindus in India (especially the Goa inquisition in the 16th century), are a direct consequence of these aims, and so are the continued attempts of today by Christian missionaries to convert people of other faiths into Christianity. To further these expansionist policies, it was necessary to go to far-away lands and ‘civilize’ and Christianize the ‘natives’. To do so, however, needed navigational skills which, in turn, needed a good knowledge of astronomy (for example while navigating with the help of the stars) and a good knowledge of trigonometry (for example to calculate the latitude and longitude). In particular, trigonometric tables of the sine and cosine functions are a must for accurately determining the latitude at sea based on the altitude of the pole star.

There was another very important reason why the church needed astronomical knowledge – to carry out the calendar reform. The calendar originally used by the church was the Julian calendar, which had an error of one day in a century. This error was accumulating over the centuries and was causing the date of Easter to drift further and further away from the spring equinox into summer. It was very important for the church to set it right. A good calendar is also essential for good navigation, and thus the problem of navigation and the calendar were closely related. Thus, the issues of navigation and the calendar were high priority programs by the church, and several mathematicians involved with the church were actively involved in finding solutions. Attractive prizes were offered to anyone who could come up with solutions to these problems. The most important member in this regard is Christoph Clavius, who modified the curriculum of the priests in Collegio Romano to teach them mathematics, and himself designed the mathematical content of the curriculum, as well as writing a text book on mathematics to be used by the priests in their education.

In spite of this, as is well known, European astronomy and mathematics of those times was hopelessly lacking in the required knowledge [3]. And at the same time, the astronomical and mathematical knowledge of India was much superior to that of Europe. The works of several Indian mathematicians were well known in Europe, thanks to Arabic translations of Sanskrit texts, and the subsequent translations into Latin [4]. Also Fibonacci had introduced the Indian number system to Europe in 1202 CE. The navigational skills of Indian merchants was also something of a legend [5].

To realize just how advanced the Indian mathematics was at this time, we need to look at the achievements of the Kerala school. The tradition of the Kerala school was started by Madhava of Sangamagrama (1340-1425 CE), who was followed by several brilliant mathematicians and astronomers which include Parameshvara (1380-1460 CE), Nilakantha Somayaji (1444-1544 CE), and Jyeshthadeva (1500-1610 CE). Madhava is credited with many of the discoveries of the Kerala school, but verly little of his writings survive. The results obtained by him are further elaborated and developed by later scholars such as Nilakantha Somayaji in his work Tantra Sangraha, and Jyeshthadeva in his work Yukti Bhasha. The Yukti Bhasha is a veritable text book of calculus, and offers detailed explanations of most of the results obtained by the Kerala scholars. The scholars of this school also made several astronomical observations and collected the data in their works, and proposed significant improvements of the then prevailing astronomical models. Among the achievements of the Kerala school are the systematic development of the ‘limit’ procedure, which is so central to calculus, the systematic analysis of inifinte series, infinite series expansions of the sine, cosine and arctan functions, (the so-called Taylor series of today), a plethora of series expansions of pi (including the one known today as the Gregory series, 300 years before Gregory discovered them), important contributions in spherical trigonometry, and the development of much improved astronomical models based on actual observations. A practical application, much sought after by European navigators, was the calculation of sine tables, which had been carried out by Madhava up to an accuracy of eight decimal places [6,7]. An interesting application of this work was the calculation of pi up to 17 decimal places, which is coded beautifully through the kattapayadi system in the Sadratnamala of Shankara Varman.  In fact many of the works of these mathematicians are still subjects of active research by modern mathematicians! And of course, behind this there was a whole body of work by earlier Indian mathematicians such as Aryabhata, Bhaskara I and II, Brahmagupta etc.

It is in the light of this vastly superior Indian mathematics and astronomy, and the tremendous eagerness of the church to possess this knowledge, that the situation in Europe in the 15th – 16th centuries must be viewed. As already mentioned, Christoph Clavius had set up the mathematical syllabus of the Jesuit priests, and in 1578, the first batch of the most capable priests trained by him, which included Matteo Ricci, Johann Schreck, and Antonio Rubino, were dispatched to the Malabar region of Kerala, including Cochin, which was the epicenter of the Kerala mathematics.

Once they were there, they set up a printing press, learnt the local language, and gained the patronage and trust of the local scholars and royal personages. And now began in earnest the task to acquire Indian texts, translate them, and dispatch them back to Europe [7]. However, all this was kept a top secret. Even today, if you make a Google search on Matteo Ricci, you will never find the real reason why he was there, although it will be mentioned that he was in Kerala. And this, in spite of the fact Ricci and Rubino have been recorded in correspondence as answering requests for astronomical information from Kerala sources [8].

However, there is enough circumstantial evidence to prove that the transfer of the calculus from India indeed took place. First, there is little doubt about the real intention behind the trip of the Jesuits to Kerala: before being sent to India in 1578, not only were they trained in mathematics by the leading astronomer of those days, Christoph Clavius,  but also that, soon thereafter in 1582, the Gregorian calendar reform took place [9]! Remember that the calendar reform was one of the pressing concerns of the church and, what is more, the committee that carried out this reform was also headed by Christoph Clavius!

Next, as mentioned already, the Kerala mathematicians had created extensive tables of sines and cosines to a high degree of accuracy. Now, in 1607, Clavius published these tables under his name, without explaining how he carried out the calculations [10]! This again leaves no doubts as to the source of these tables.

The above two circumstances are quite strong to come to the conclusion that the Europeans surreptitiously used the Kerala texts, but there is more. At the end of the 16th century, the Danish astronomer Tycho Brahe came up with his ‘Tychonic model’ of planetary motion, wherein Mercury, Venus, Mars, Jupiter and Saturn revolve around the sun, but the sun is revolving around the earth. What is interesting to note here is that this is exactly the model proposed by Nilakantha in his Tantra Sangraha some 300 years earlier [11]! What a ‘coincidence’! Remember that Tycho Brahe in the capacity of the Royal astronomer of the Holy Roman Empire had easy access to all the Kerala texts sent by missionaries such as Ricci. He was also known to be extremely secretive and jealous about the astronomical observations and other documents in his possession [11]. The only explanation and conclusion is that Brahe was in possession of the work of the Kerala school of mathematics which he used to come up with his ‘Tychonic model’.

We must also mention that Jyeshthadeva’s Yuktibhasha gives a formula involving a passage to infinity to calculate the area under a parabola. The same formula was used by Fermat, Pascal, and Wallis [8]. Wallis is also given partial credit for the development of calculus. It is thus quite safe to conclude that the Kerala texts fell into the hands of these mathematicians, based on whose work Newton and Leibniz came up with the ideas of calculus. The possibility that Newton and Leibniz had direct access to these texts cannot be ruled out.

Finally the question may be raised as to why the church kept all this activity so secret. The answer is obvious: the church could not possibly carry out its noble mission of ‘civilizing pagan cultures’ and at the same time accept that these cultures had a much advanced scientific culture upon which it (the church) was so dependent! This only makes sense since it is difficult for a ‘superior’ race to cope with the fact that an ‘inferior’ race can have a civilization and culture much more advanced than theirs. This is the reason why the Aryan race theory was created by the European imperialists when the antiquity and culture of the Hindu civilization was discovered [12]. Moreover, in the case of the church, anyone who professed to be using ‘pagan’ sources of knowledge ran the certain risk of being a heretic and being burnt at the stake for ‘devil-worship’. This certainly was a good enough incentive for anyone to conceal the true sources of knowledge! In this context, it is instructive to read the following quote from [13]:

“There is nothing ‘natural’ or universal in hiding what one has learnt from others: the Arabs, for instance, did not mind learning from others, and they openly acknowledged it. This is another feature unique to the church: the idea that learning from others is something so shameful that, if it had to be done, the fact ought to be hidden. Therefore, though the church sought knowledge about the calendar, specifically from India, and profusely imported astronomical texts … this import of knowledge remained hidden.”

Since the modern world is fortunately not governed by ecclesiastical restrictions anymore, and since it is good scientific practice to give credit where it is due, it is time that we revise the standard story of calculus and honor and remember its original inventors from Bharat.


[1] ‘On the Hindu quadrature of the circle, and the infinite series of the proportion of the circumference to the diameter exhibited in the four Sastras, the Tantra Sangraham, Yucti Bhasha, Carana Padhati, and Sadratnamala’, by C. M. Whish, published in the  Transactions of the Royal Asiatic Society of Great Britain and Ireland, Vol.  3, No. 3, pp. 509–523.

[2] Encyclopedia of the history of science, technology and medicine in non-western cultures (two volumes), ed. Helaine Selin, Springer.

[3] To understand the status of European navigation in the 16th century, look up Navigation, Maths and Astronomy: the Pagan Knowledge, by D. P. Agrawal (–Navigation%20&%20Math.pdf  ).

[4] In this context we note how the modern names for the trigonometric functions ‘sine’ and ‘cosine’ originated: “When Arabic writers translated his (Aryabhata’s) works from Sanskrit into Arabic, they referred it as jiba. However, in Arabic writings, vowels are omitted, and it was abbreviated as jb. Later writers substituted it with jaib, meaning “pocket” or “fold (in a garment)”. (In Arabic, jiba is a meaningless word.) Later in the 12th century, when Gherardo of Cremona translated these writings from Arabic into Latin, he replaced the Arabic jaib with its Latin counterpart, sinus, which means “cove” or “bay”; thence comes the English sine” (

[5] One of the best kept secrets of Western history is that Vasco da Gama and Columbus were no good navigators at all. It is commonly assumed that Vasco da Gama ‘discovered’ India- he did nothing of the sort. In fact he was safely escorted to India by an Indian merchant from Gujarat, named Kanha, from the African coast.

[6] See for example’s_sine_table

[7] C.K. Raju (2007). Cultural foundations of mathematics: The nature of mathematical proof and the transmission of calculus from India to Europe in the 16 thc. CE. History of Philosophy, Science and Culture in Indian Civilization. X Part 4. Delhi: Centre for Studies in Civilizations. pp. 114–123.

[8] D. F. Almeida and G. G. Joseph, Eurocentrism in the history of mathematics: the case of the Kerala school, Race and Class, Vol. 45(4): 45-59 (2004).

[9] Resulting in the so-called Gregorian calendar, which is the one used today.

[10] Christophori Clavii Bambergensis, Tabulae Sinuum, Tangentium et Secantium ad partes radij 10,000,000 (Ioannis Albini, 1607), as quoted in C. K. Raju, Teaching mathematics with a different philosophy, Part 2: Calculus without Limits, Science and Culture 77(7-8) (2011) pp. 280-285.

[11] C. K. Raju, Ending Academic Imperialism: a Beginning. Available online at

[12] An excellent account of the Aryan race theory is given in Breaking India, by Rajiv Malhotra and Aravindan Neelakandan.

[13] D. P. Agrawal, Navigation, Maths and Astronomy: the Pagan Knowledge. The article can be accessed at–Navigation%20&%20Math.pdf

A TEDx Talk on Reality Beyond Conventions By D.K.Hari and D.K.Hema Hari, Bharath Gyan


This talk brings to light, the not so commonly known scientific truth behind some of the conventional practices, beliefs, names, celebrations and vocations of the Indian people from the perspective of astronomy.

What is in a name?

Is there any reality behind the naming conventions of India?

Why do the stars and planets bear the names they do? What do their names convey?

Why are certain festivals celebrated when they are?

What do some of the legends of India actually convey?

Why do we have a name Bharata varsha for India?

The talk will showcase the principled manner in which space is organized and the cosmos is working.

The beauty with which, the ancients of India had drawn a parallel between the phenomena in the cosmos and events in their daily lives on earth, be it in social life, personal life or occupation, leaves one wondering at the design in Nature. It leaves one even more amazed at the design of the human mind, which could fathom this truth and fashion it in different forms to suit the occasion.

The facts, as they unfold, will bring to fore, the scientific temper that had existed in India in days of yore, as well as the inherent desire of our ancestors to stay connected with the cosmos. A yearning, well worth earning from them!

Good Heavens! How on earth did they fathom this?

Bhagavad Gita – Birth Date

Come November and it is time to celebrate the Gita. 22nd November as per the English calendar and Margashira Shukla Paksha Ekadashi day, i.e. the 11th   phase of the bright fortnight of the Margashira month as per the Indian calendar, is the day to commemorate the birth of the Gita.

Who or which Gita are we referring to here?

It is the Bhagavad Gita, which has been the literature of this civilization, this land and this nation since we can all remember.

It is the Gita which has been playing many roles in the lives of Indians, since the times of Krishna, who delivered it and left it behind to guide the people for long after His own lifetime.


Gita Upadesha

Gita in Law

In the court one swears by the Gita. This practice has been going on for over 200 years. That makes it the nationally accepted book, both on a personal count and as well as being legally tenable. Not accepting the truth after swearing on the Gita, amounts to perjury.

All these were in practice, much before the words secularism and pseudo secularism came to vogue in India.

The Most Comprehensive Guide

The Bhagavad Gita answers one’s many queries, both from the Sthoola, bodily level and from the Sukshma, the subtle, ethereal level.

Upa means “near” and adesha means “instruction”. Upadesha is the instruction received by a disciple, sitting close to his master.

Krishna while delivering the Bhagavad Gita to Arjuna says,

“I taught this to Vivasvan, who in turn passed it on to Vaivasvata Manu, from whom it was passed on to Ikshvaku, after which it was lost in the passage of time. As this knowledge is since lost, I, Krishna, son of Vasudeva am giving it you Arjuna, on this battlefield.”

The teaching of Krishna, was applicable not only to Arjuna and the situation that he was in, but is also applicable to each one of us today even after so many millennia. Through the medium of this dialogue between Krishna and Arjuna, mankind, to this day, continues to enjoy and benefit from the most comprehensive guide to right living in this Universe.

This Bhagavad Gita discourse by Krishna shows Him in the light of one of the foremost spiritual teachers of mankind. His teachings through the Gita have remained a universal guide to mankind across many millennia, inspiring and leading many to walk the path of duty and righteousness.

Kurukshetra Battle and Bhagavad Gita

The uniqueness of Bhagavad Gita lies in the fact that it was given on a battle field, at the beginning of the battle between the Pandava and the Kaurava at Kurukshetra.

On the day of the war the armies are lined up, ready to fight, waiting for the signal to start the battle.

At this juncture, standing at the head of the Pandava Army, facing the war giants on the Kaurava side, Arjuna, the archer par excellence and the main warrior for the Pandava forces, is troubled by serious doubts.

He sees that in front of him, the opponents whom he has to engage in battle and kill, are his own Guru – Dronacharya, his Grand Sire – Bheeshma, his own cousins – the Kaurava and other known friends.

Arjuna then questions Krishna, his friend, cousin, confidante and mentor in life, now in the role of his charioteer, of the paradoxical need to shed blood of his near and dear ones, only to establish rights over a kingdom. He asks Krishna as to why he should fight for the kingdom, if all his near and dear were to perish in the same war?


Kurukshetra battle to start

Krishna then takes on the role of a philosopher, a teacher and explains to Arjuna the meaning of life, this creation, this universe and man’s role in it. Krishna dwells exhaustively on the concept of the soul and its relation to the body, the concept of the body and its relation to the acts it performs, the concept of these acts and their relation to their results, the concept of these results and their relation back to the soul and finally the concept of the soul and its relation to the supreme consciousness of the cosmos.

Step by step, with an answer for every question asked by Arjuna, Krishna patiently leads Arjuna into a world of deep spiritual knowledge, where Arjuna sees Krishna’s cosmic form. Arjuna learns of the ways of operation of the cosmos and the cosmic consciousness, which would apply to himself and all the beings around him, irrespective of whether he decides to fight the battle or not and whether he kills his near and dear ones or not.

Krishna elevates Arjuna to the highest echelons of knowledge about the way of life in the Universe.

Arjuna was going through an exhilarating experience of God Himself explaining the nuances of the cosmic laws to him.

Date of Gita

The Bhagavad Gita Upadesha and the start of the battle, occur on the same day. Today, with the aid of the sky configurations described in the Mahabharatha text we can assign a date in the modern calendar to the date of the battle and hence a date for this “Song of the Divine”.

We have been able date the life of Krishna and the various events of the Mahabharata through our series, “Historical Krishna”.


Tradition calls this day when Gita was born as Gita Jayanthi and to this day it is celebrated on Margashira Shukla Paksha Ekadashi, meaning the 11th day in the bright fortnight of the month of Margashira.

On this day, there was a New Moon along with a Solar Eclipse, in Jyeshta star on October 14th, 3067 BCE, followed by a Full Moon on October 28th, 3067 BCE. This lunar cycle marked the lunar month of Karthika, since the full moon occurred near Karthik star.

The month that follows Karthika, is Margashira and the New Moon occurred around 12 Nov 3067 BCE. This makes Nov 22nd, 3067 BCE, which was the start of the battle and the day of Gita, a Margashira Shukla Paksha Ekadashi day, the 11th  phase of the bright fortnight of Margashira.

The tradition of celebrating Margashira Shukla Paksha Ekadashi day as Gita Jayanthi matches what the skies showed 5100 years ago.

This means that the year 2016 is the 5083rd year since the Upadesha of Gita.

A Revelation of God Himself

The Bhagavad Gita was revealed to mankind by God Himself. The word Bhagavad means ‘God, the Lord’ and Gita means ‘Song’. The word ‘Bhagavad Gita’ thus literally translates to, ‘Song of God’.

Krishna reveals his Viswaroopa, the Cosmic Form to Arjuna, showing that He is the Supreme Lord of Creation, incarnated in a human form to add credibility to His Gita.


Vishvaroopa Darshana

This revelation of God, the Gita Upadesha was witnessed by Arjuna, Sanjaya the commentator, Vyasa the compiler and a host of other fortunate ones.

Arjuna’s grandfather, Krishna Dwaipayana, whom we reverentially call as Veda Vyasa, for he also compiled the Veda, recorded the Gita Upadesa for posterity.

The Difference

There have been many occasions in many lands, many civilizations, where God has conveyed His message to mankind, through His Son or through a messenger, a Prophet.

Similarly, there have been other times when God has thought it fit to pass on knowledge through different noble and wise persons.

In that sense, this land, the civilisation and nation of India, has experienced a difference, for, it has had the privilege to have an Avatar, an incarnation of God Himself, giving His message to mankind in person. And this was in the form of His song, the Bhagavad Gita.

Bhagavad Gita not a religious text

Bhagavad Gita deals with life, duties, actions, mind, soul, purpose of life and the belief in the divine God. All these aspects are common to human life, civilizations and all religions. From this perspective, Bhagavad Gita is a manual of all these above points and not to be limitedly construed as a religious text, even though it has come down from the mouth of God. The dialogue between the two, Krishna and Arjuna, was more about the purpose of life and actions than a religious discourse.

Gita therefore, should verily and proudly be accorded the status of a knowledge asset, a literary treasure, a godsend counsel for realization of the self, whether one is a citizen of India or the world.