Kak's writings concerning the astronomy of the Vedic period in his book The Astronomical Code of the Rgveda (1994) back "Indigenous Aryans" ideology, questioning mainstream views on the Indo-Aryan migration and the nature of early Indian science. His chronology and astronomical calculations have been opposed by several Indologists (such as Michael Witzel) and historians of science, but found a supporter in German Indologist Klaus Klostermaier". Kak's interpretation has been included in recent overviews of astronomy in the Vedic period in India and the West.

The Astronomical Code of the Rigveda

The Astronomical Code of the Rigveda (New Delhi: Aditya Prakashan, 1994; revised and enlarged edition, New Delhi: Munshiram Manoharlal, 2000) claims regularities in the organization of the Rigveda, connecting the structure to certain numbers in the astronomy-based ritual of the five-layered brick altars of the Vedic times.

Kak's archaeoastronomical claims have the effect of significantly extending the Vedic period, postulating the arrival of ethnic Indo-Aryans to the 7th millennium BC. This claim is in contradiction with mainstream Indology and historical linguistics and science historians

Kak arranges the number of hymns in each book of the Rigveda as follows, and compares the arrangement to a Vedic fire altar:

 [[RV 10]]:191      [[RV 9]]:114
 [[RV 7]] :104      [[RV 8]]: 92
 [[RV 5]] : 87      [[RV 6]]: 75
 [[RV 3]] : 62      [[RV 4]]: 58
 [[RV 2]] : 43      [[RV 1]]:191

He then computes various sums and subtractions within the diagram, finding numbers related to the distance between the Earth and the Sun, and the sidereal periods of various planets.

Kak's method depends on the structure of the Rigveda as redacted by Shakalya in the late Brahmana period as opposed to the intrinsic content in the oldest portions of the text. Specifically, Witzel (2001) believes that Kak's approach relates to the organizations of the Rigveda into mandalas ("books"), a process of redaction undertaken by the shakhas long after the composition of the individual hymns (the samhita prose period, dating to well within the Indian Iron Age), rendering the attempt to date the text in this flawed. Other scholars have discredited Kak's claims, finding them to be contrived. Nanda has said that Kak's "method is breathtakingly ad hoc and reads like numerology 101."

In Search of the Cradle of Civilization

Kak co-authored In Search of the Cradle of Civilization (1995) participating in the controversy in Indian politics surrounding Indigenous Aryans and the Out of India theory.

Ashvamedha

Kak's book The Asvamedha: The Rite and Its Logic (2002) provides a symbolic interpretation of the Vedic Ashvamedha (horse sacrifice) rite.

Kak takes a staunchly conservative stance politically, supporting Indian "nuclear deterrence" against China, opposing what he calls "socialist ideas" in the Indian constitution, the "Soviet-style ideas of the Congress party" and "terrorists from across the [Pakistani] border".Alan Sokal sarcastically labeled Kak "one of the leading intellectual luminaries of the Hindu-nationalist diaspora", in the course of a discussion in which Sokal discusses pseudoscientific aspects of Hindutva ideology, under which he includes of some of Kak's work.

Subhash Kak completed his Ph.D. at the Indian Institute of Technology, Delhi in 1970. He taught there and also at Imperial College London, Bell Laboratories, and the Tata Institute of Fundamental Research (TIFR)..In 1979 he was tenured as Delaune Distinguished Professor of Electrical Engineering at Louisiana State University, Baton Rouge. In 2007, he was appointed head of the Computer Science department at Oklahoma State University.

His research in the fields of cryptography, random sequences, artificial intelligence, and information theory have been published in peer reviewed journals. He proposed a test of algorithmic randomness, and a type of instantaneously trained neural networks (INNs) (which he and his students have called "Kak neural networks"). He claims to be amongst the first to apply information metrics to quantum systems.

Kak has argued that there are limits to the intelligence machines can have and it cannot equal biological intelligence. He asserts that

machines fall short on two counts as compared to brains. Firstly, unlike brains, machines do not self-organize in a recursive manner. Secondly, machines are based on classical logic, whereas Nature's intelligence may depend on quantum mechanics.

[Further], if machines with consciousness are created, they would be living machines, that is, variations on life forms as we know them. Second, the material world is not causally closed, and consciousness influences its evolution. Matter and minds complement each other.

Kak has proposed the use of recurring decimals for error correction coding, cryptography and as random sequences.

"Kak neural network"

The Kak neural network is an instantaneously trained neural network that creates a new "hidden neuron" for each training sample, achieving immediate training for binary data. The training algorithm for binary data creates links to the new hidden node that simply reflects the binary values in the training vector. Hence no computation is involved.

"Kak's three stage protocol"

"Kak's three stage protocol" is a protocol for quantum cryptography suggested by Kak.

Kak claimed to be the first to have used the term "quantum neural computing", taking a Quantum mind position not unlike that notably proposed by Roger Penrose in The Emperor's New Mind which was published in 1989.He sees the brain as a machine that reduces the infinite possibilities of a "quantum-like universal consciousness", which is a consequence of the "recursive nature of reality".

Kak's "philosophy of recursionism" is expounded in his books The Gods Within, The Architecture of Knowledge, and The Prajna Sutra. Kak contributes to the Project of History of Indian Science, Philosophy and Culture.

In The Architecture of Knowledge, Kak talks about quantum mechanics, neuroscience, computers, and consciousness. The book is one of the twenty planned monographs in the multi-volume series on the Project of History of Indian Science, Philosophy and Culture under the general editorship of Professor D. P. Chattopadhyaya.

The book attempts to provide philosophical connections to contemporary science that reach back not only to the Greek but also to the Indian tradition.

The book seeks to find a consistent framework for knowledge in logic, purpose, and awareness, and sees science as representation and transformation of machines, of reality, and of life. Reality is seen in different layers, and

"with the dual aspects of purposive and reflexive behaviour in each layer, we see parallels in the structures in quantum theory, neuroscience, and computers. The overarching unity is provided by human consciousness. As conscious subjects, we examine the universe through the agency of our minds. In our strivings to describe the outer world using formal knowledge, shadows of the architecture of the inner world are also unveiled."

In February 2007 a Louisiana State University (LSU) press releaseasserted that Kak had "resolved the twin paradox".The actual paper states that the twin paradox has "various 'resolutions' that are not in consonance with each other", while in state-of-the-art physics, there is nothing unresolved about the so-called twin paradox, rendering any claim to have "resolved" it meaningless.

Non-fiction

• Patanjali and Cognitive Science (1987)
• India at Century's End, South Asia Books / Voice of India, (1994) ISBN 81-85990-14-X
• Georg Feuerstein, Subhash Kak, David Frawley, In Search of the Cradle of Civilization, Ill: Quest Books, (1995, 2001) ISBN 0-8356-0741-0.
• The Astronomical Code of the Rigveda; Munshiram Manoharlal Publishers Pvt. Ltd (2000), ISBN 81-215-0986-6
• Computing Science in Ancient India; Munshiram Manoharlal Publishers Pvt. Ltd (2001)
• The Wishing Tree: The Presence and Promise of India, Munshiram Manoharlal Publishers Pvt. Ltd (2001), ISBN 81-215-1032-5
• The Gods Within: Mind, Consciousness and the Vedic Tradition, Munshiram Manoharlal Publishers Pvt. Ltd (2002) ISBN 81-215-1063-5
• The Asvamedha: The Rite and Its Logic, Motilal Banarsidass Publishers, (2002) ISBN 81-208-1877-6
• The Nature of Physical Reality, Peter Lang Pub Inc, 1986, ISBN 0-8204-0310-5
• "The Prajna Sutra: Aphorisms of Intuition", 2003.
• The Architecture of Knowledge: Quantam Mechanics, Neuroscience, Computers and Consciousness, Manohar Pubns, 2004, ISBN 81-87586-12-5
• "Recursionism and Reality: Representing and Understanding the World", 2005.
• Advances in Communications and Signal Processing, Springer-Verlag, 1989. (with W.A. Porter).
• Advances in Computing and Control, Springer-Verlag, 1989. (with W.A. Porter and J.L. Aravena).

Poetry

• The Conductor of the Dead, Writers Workshop (1973) ASIN: B0007AGFHA
• The London Bridge, Writers Workshop, Kolkata, 1977.
• The secrets of Ishbar: Poems on Kashmir and other landscapes, Vitasta (1996) ISBN 81-86588-02-7

Essays

• Columns on Rediff

Interviews

• debate with Sunil Khilnani on pbs.org
• Beliefnet Interview
• Indereunion Interview

Poetry

• "New Poems" (indiastar.com)

Subhash Kak????? ???Subhash KakSubhash KakSubhash KakSubhash KakSubhash Kak????? ???????? ???Subhash KakSubhash KakSubhash KakSubhash Kak????? ???Subhash Kak????? ???????? ???Subhash KakSubhash Kak????? ???Subhá? KákSubhash KakSubhash KakSubhash KakSubhash KakSubhash Kak