Showing posts with label Mathematics. Show all posts
Showing posts with label Mathematics. Show all posts

Saturday, November 10, 2007

Sequences of numbers involved in unsolved problems



Florentin Smarandache, "Sequences of numbers involved in unsolved problems"
Publisher: Hexis | Pages: 139 | ISBN: 1599730065 | PDF | 461 KB

Over 300 sequences and many unsolved problems and conjectures related to them are presented herein. The book contains definitions, unsolved problems, questions, theorems corollaries, formulae, conjectures, examples, mathematical criteria, etc. ( on integer sequences, numbers, quotients, residues, exponents, sieves, pseudo-primes/squares/cubes/factorials, almost primes, mobile periodicals, functions, tables, prime/square/factorial bases, generalized factorials, generalized palindromes, etc. ).

http://rapidshare.com/files/68609924/SEQUENCES_OF_NUMBERS.pdf

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Sunday, August 5, 2007

Reed, Simon - Methods of Modern Mathematical Physics, Vol. 3: Scattering Theory



Michael Reed, Barry Simon, "Methods of Modern Mathematical Physics, Vol. 3: Scattering Theory"
Academic Press | ISBN 0125850034 | Year 1979 | 463 pages | DjVu | 7.1 MB

Scattering theory is the study of an interacting system on a scale of time and/or distance which is large compared to the scale of the interaction itself. As such, it is the most effective means, sometimes the only means, to study microscopic nature. To understand the importance of scattering theory, consider the variety of ways in which it arises. First, there are various phenomena in nature (like the blue of the sky) which are the result of scattering. In order to understand the phenomenon (and to identify it as the result of scattering) one must understand the underlying dynamics and its scattering theory. Second, one often wants to use the scattering of waves or particles whose dynamics on knows to determine the structure and position of small or inaccessible objects. For example, in x-ray crystallography (which led to the discovery of DNA), tomography, and the detection of underwater objects by sonar, the underlying dynamics is well understood. What one would like to construct are correspondences that link, via the dynamics, the position, shape, and internal structure of the object to the scattering data. Ideally, the correspondence should be an explicit formula which allows one to reconstruct, at least approximately, the object from the scattering data. The main test of any proposed particle dynamics is whether one can construct for the dynamics a scattering theory that predicts the observed experimental data. Scattering theory was not always so central the physics. Even thought the Coulomb cross section could have been computed by Newton, had he bothered to ask the right question, its calculation is generally attributed to Rutherford more than two hundred years later. Of course, Rutherford's calculation was in connection with the first experiment in nuclear physics.

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http://rapidshare.com/files/46946965/Reed.Simon.Methods.of.Mathematical.Physics.Vol.3.Scattering.Theory.djvu

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Reed, Simon - Methods of Modern Mathematical Physics, Vol. 4: Analysis of Operators



Michael Reed, Barry Simon, "Methods of Modern Mathematical Physics, Vol. 4: Analysis of Operators"
Academic Press | ISBN 0125850042 | Year 1978 | 325 pages | DjVu | 8.6 MB

Best-seller of the XXth Century in Mathematical Physics voted on by participants of the XIIIth International Congress on Mathematical Physics. This revision will make this book more attractive as a textbook in functional analysis. Further refinement of coverage of physical topics will also reinforce its well-established use as a course book in mathematical physics. This book covers the theory of eigenvalues of Schrodinger operators. It clearly explains the basic concepts involved: perturbation theory (summability questions, Fermi's golden rule), min-max principle for discrete spectrum, Weyl theorem, HVZ theorem, the absence of singular continuous spectrum, ground state questions, periodic operators, semi-classic distribution of eigenvalues, compactness criteria.

http://rapidshare.com/files/46948497/Reed.Simon.Methods.of.Mathematical.Physics.Vol.4.Analysis.of.Operators.djvu

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