Pandemic days-6: Genetic risk factors
The coronavirus that made its way to humans aided by the Cīna-s at Wuhan has now been with us for nearly an year. Right from the early days of this outbreak, one thing has been notable about this...
View ArticleBhāskara’s dual square indeterminate equations
PDF for convenient reading Figure 1. Sum and difference of squares amounting to near squares. In course of our exploration of the bhūjā-koṭi-karṇa-nyāya in our early youth we had observed that there...
View ArticleThe old teacher
The summer of the year after the tumultuous events, Lootika and Somakhya were traveling to visit their parents. They were supposed to attend the marriage of Somakhya’s cousin Saumanasa but they found...
View ArticlePrakīrṇaviṣayāḥ: Life, brains, warfare and society
1 On big brains An occidentally conditioned person remarked that “we were making bad use of the great brains we have evolved. Instead of using it for human betterment, we were expending it on killing...
View ArticleThe cosine principle, radial effect and entropy in the generalized Lozi map
The generalized Lozi map is a good way to illustrate the cosine principle and the radial effects (in lay circles to which I belong in this regard, as opposed to mathematicians). The generalized Lozi...
View ArticleBṛhaspati-śanaiścarayor yuddham-2020 ityādi
The below is only for information. Parts of it should not be construed as any kind of prognostication on our part. The great Hindu naturalist Varāhamihira describes various kinds of planetary...
View ArticleRV 10.5
The Ṛgveda is replete with obscure sūkta-s but RV 10.5 might easily take a place in the top tier of those. One might even ask why even attempt to write a commentary on this. We admit we could be...
View ArticleYajus incantations for the worship of Rudra from the Kāṭhaka ritual manuals
This article is available as a pdf document. The notes from it are appended below. The loss of the northern and northwestern Kṛṣnayajurveda traditions due to the Mohammedan depredations of Northern...
View ArticleSome notes on the Henon-Heiles Hamiltonian system
Anyone familiar with dynamical systems knows of the Henon-Heiles (HH) system. What we are presenting here is well-known stuff about which reams of material have been written. However, we offer certain...
View ArticleSome notes on the Brahmayajña brāhmaṇa and Uttama-paṭala of the Atharvaṇ...
PDF version The Brahmayajña brāhmaṇa (1.1.29 of the Gopatha-brāhmaṇa) of the Atharvaveda provides a glimpse of the Vedic saṃhitā canon as known to the brāhmaṇa authors of the AV tradition. The...
View ArticleThe phantoms of the bone-pipe
As Vidrum was leafing through some recent case studies to gather the literature for his own production, he received a call from his chauffeur. He had fetched Vidrum’s new car. Vidrum went out to take a...
View ArticleHuntington and the clash: 21 years later
This note is part biographical and part survey of the major geopolitical abstractions that may be gleaned from the events in the past 21 years. Perhaps, there is nothing much of substance in this note...
View ArticleA guilloche-like trigonometric tangle
Coprimality, i.e., the situation where the GCD of 2 integers is 1 is one of the fundamental expressions of complexity. In that situation, two numbers can never contain the other within themselves or in...
View ArticleModulo rugs of 3D functions
Consider a 3D function . Now evaluate it at each point of a integer lattice grid. Compute corresponding to each point and plot it as a color defined by some palette that suits your aesthetic. The...
View ArticleA great statistician, and biographical, numerical musings on ancient game
Recently my friend brought it to my attention that C. Radhakrishna Rao had scored a century. Born in 1920 CE to Doraswamy Nayadu and A. Laxmikanthamma from the Andhra country, he is one of the great...
View ArticleJohannes Germanus Regiomontanus and his rod
Even before we had become acquainted with the trigonometric sum and difference formulae or calculus are father had pointed to us that there was an optimal point at which one should stand to observe or...
View ArticleMaking an illustrated Nakṣatra-sūkta and finding the constellation for a...
The illustrated Nakṣatra-sūkta Towards the latter phase of the Vedic age, multiple traditions independently composed sūkta-s that invoked the pantheon in association with their home nakṣatra-s as part...
View ArticlePandemic days: Galtonism hits India
At some point last year, we stopped writing any further dispatches regarding the pandemic catastrophe from the disease because everything was playing out more or less as laid out in the earlier notes....
View ArticleThe phantoms of the bone-pipe-2
Vidrum had been introduced to a synesthetic patient by a neurologist colleague. His manifestation of synesthesia left a rather profound impact on him; thus, when he had a break of an hour in his...
View ArticleGenerating simple radially symmetric art
Many people experience beauty in structures with bilateral, radial and rotational symmetries with or without recursion. The recursive or nested structure are the foundation of the beauty in fractal...
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