"Sir Hermann Bondi, NatureThe late S. Chandrasekhar was best known for his discovery of the upper limit to the mass of a white dwarf star, for which he received ...

According to the Rayleigh criterion of classical optics, the finite resolving power of a microscope is due to the width of the central peak of the Fraunhofer diffraction pattern produced by the microscope's finite lens aperture. During the last few decades, theories and techniques for superresolution beyond the Rayleigh criterion have been developed in classical optics. Thus, Heisenberg's microscope could also in principle be made to give superresolution and thereby appear to violate the uncertainty relation. We believe that this paradox (...) is due to the inappropriate use of a definition, based purely on experimental convenience, to support a quantum mechanical theorem. (shrink)

Newton's Philosophiae Naturalis Principia Mathematica provides a coherent and deductive presentation of his discovery of the universal law of gravitation. It is very much more than a demonstration that 'to us it is enough that gravity really does exist and act according to the laws which we have explained and abundantly serves to account for all the motions of the celestial bodies and the sea'. It is important to us as a model of all mathematical physics.Representing a decade's work from (...) a distinguished physicist, this is the first comprehensive analysis of Newton's Principia without recourse to secondary sources. Professor Chandrasekhar analyses some 150 propositions which form a direct chain leading to Newton's formulation of his universal law of gravitation. In each case, Newton's proofs are arranged in a linear sequence of equations and arguments, avoiding the need to unravel the necessarily convoluted style of Newton's connected prose. In almost every case, a modern version of the proofs is given to bring into sharp focus the beauty, clarity, and breath-taking economy of Newton's methods.Subrahmanyan Chandrasekhar is one of the most reknowned scientists of the twentieth century, whose career spanned over 60 years. Born in India, educated at the University of Cambridge in England, he served as Emeritus Morton D. Hull Distinguished Service Professor of Theoretical Astrophysics at the University of Chicago, where he has was based from 1937 until his death in 1996. His early research into the evolution of stars is now a cornerstone of modern astrophysics, and earned him the Nobel Prize for Physics in 1983. Later work into gravitational interactions between stars, the properties of fluids, magnetic fields, equilibrium ellipsoids, and black holes has earned him awards throughout the world, including the Gold Medal from the Royal Astronomical Society in London, the National Medal of Science in the United States, and the Copley Medal from the Royal Society. His many publications include Radiative transfer, Hydrodynamic and hydromagnetic stability, and The mathematical theory of black holes, each being praised for its breadth and clarity. Newton's Principia for the common reader is the result of Professor Chandrasekhar's profound admiration for a scientist whose work he believed is unsurpassed, and unsurpassable. (shrink)

About the Book : Several years ago, on a fateful night in a colonial house in Yercaud, Tamil Nadu, UG Krishnamurthi made a bonfire of Chandrasekhar's dreams.

Summary The 1935 conflict on the nature of relativistic degeneracy that pitted Subrahmanyan Chandrasekhar against Arthur Stanley Eddington is part of astronomical lore. In recountings of the events surrounding the dispute, the complaint is frequently aired that Chandrasekhar, who faced the pre-eminent astrophysicist of his time, did not enjoy the support of the astronomical community, which opted to side instead with Eddington. We reconsider these statements in the light of the published record and argue that the reception of (...) Chandrasekhar's ideas was, if anything, rather favourable and that any perceived lack of support may have been due in great part to the inability to distinguish, on an observational basis, between the predictions of the competing theories. We further argue that the observational situation improved little over the subsequent thirty years, but that this did not prevent Chandrasekhar's version of relativistic degeneracy, and associated theory of electron-degenerate stars, from gaining a central position within the realm of stellar structure and evolution. We briefly compare this status to that enjoyed by general relativity before 1960. (shrink)

In print for the first time in over ten years, Act and Crime provides a unified account of the theory of action presupposed by both Anglo-American criminal law and the morality that underlies it. The book defends the view that human actions are always volitionally caused bodily movements and nothing else. The theory is used to illuminate three major problems in the drafting and the interpretation of criminal codes: 1) what the voluntary act requirement both does and should require; 2) (...) what complex descriptions of actions prohibited by criminal codes both do and should require ; and 3) when two actions are 'the same' for purposes of assessing whether multiple prosecutions and multiple punishments are warranted. The book both contributes to the development of a coherent theory of action in philosophy, and it provides both legislators and judges a grounding in three of the most basic elements of criminal liability. (shrink)

In this short, dense essay, Jean Cavaillès evaluates philosophical efforts to determine the origin - logical or ontological - of scientific thought, arguing that, rather than seeking to found science in original intentional acts, a priori meanings, or foundational logical relations, any adequate theory must involve a history of the concept. Cavaillès insists on a historical epistemology that is conceptual rather than phenomenological, and a logic that is dialectical rather than transcendental. His famous call (cited by Foucault) to abandon "a (...) philosophy of consciousness" for "a philosophy of the concept" was crucial in displacing the focus of philosophical enquiry from aprioristic foundations toward structural historical shifts in the conceptual fabric. This new translation of Cavaillès's final work, written in 1942 during his imprisonment for Resistance activities, presents an opportunity to reencounter an original and lucid thinker. Cavaillès's subtle adjudication between positivistic claims that science has no need of philosophy, and philosophers' obstinate disregard for actual scientific events, speaks to a dilemma that remains pertinent for us today. His affirmation of the authority of scientific thinking combined with his commitment to conceptual creation yields a radical defense of the freedom of thought and the possibility of the new. (shrink)

Tri filosofskikh "opravdanii︠a︡" (teodit︠s︡ei︠a︡, antropodit︠s︡ei︠a︡, kosmodit︠s︡ei︠a︡ Serebri︠a︡nogo veka) -- Russkai︠a︡ sofiologii︠a︡ i kabbala -- S. Bulgakov : nauka sofiologii︠a︡ (ili konet︠s︡ religii) -- Tretiĭ Zavet o. Sergii︠a︡ Bulgakova -- Tretʹezavetnai︠a︡ misterii︠a︡ ("malai︠a︡" trilogii︠a︡ Bulgakova).

v. 1. pt. 1. Babaji's glimpses of the Tamil 18 Siddhas. pt. 2. [non-Roman data].

In Alfonso de Cartagena's 'Memoriale virtutum' (1422) María Morrás and Jeremy Lawrance offer a new edition from the manuscripts of a compilation of Aristotle's Nicomachean Ethics addressed by the major Castilian intellectual of the day, bishop Alfonso de Cartagena, to the heir to the throne of Portugal, crown prince Duarte. The work was a speculum principis, an education for the future king in the virtues suitable to a statesman; Cartagena's choice of Aristotle was thus a significant index of the advent (...) of new Renaissance ideas. This edition shows how the "memorial" throws light on the ideological transformation of society those ideas would bring, setting new ethical guidelines for the ruling class at the crossroads between medieval feudalism and Renaissance absolutism. (shrink)

Contributors to this volume consider the implications of 'the Age of Breath': a spiritual shift in human awareness to the needs of the other figured through breathing.

Verse treatises on Advaita Jaina, and Nyaya philosophy.