Tag: Presented

Free Download Finitely Presented Groups: With Applications in Post-Quantum Cryptography and Artificial Intelligence by Volker Diekert, Martin Kreuzer
English | October 7, 2024 | ISBN: 3111473376 | 252 pages | MOBI | 2.84 Mb
This book contains surveys and research articles on the state-of-the-art in finitely presented groups for researchers and graduate students. Overviews of current trends in exponential groups and of the classification of finite triangle groups and finite generalized tetrahedron groups are complemented by new results on a conjecture of Rosenberger and an approximation theorem. A special emphasis is on algorithmic techniques and their complexity, both for finitely generated groups and for finite Z-algebras, including explicit computer calculations highlighting important classical methods. A further chapter surveys connections to mathematical logic, in particular to universal theories of various classes of groups, and contains new results on countable elementary free groups. Applications to cryptography include overviews of techniques based on representations of p-groups and of non-commutative group actions. Further applications of finitely generated groups to topology and artificial intelligence complete the volume. All in all, leading experts provide up-to-date overviews and current trends in combinatorial group theory and its connections to cryptography and other areas.

Free Download Symposia on Theoretical Physics 4: Lectures presented at the 1965 Third Anniversary Symposium of the Institute of Mathematical Sciences Madras, India By Victor Weisskopf (auth.), Alladi Ramakrishnan (eds.)
1995 | 161 Pages | ISBN: 1468476939 | PDF | 4 MB
The Third Anniversary Symposium, held in January 1965, was devoted mainly to various topics in elementary particle physics, with a few lectures on many-body problems and a short supple mentary program in mathematics. * In the Introductory Address Professor V. Weisskopf, Director General of CERN, Geneva, presented a broad survey of the then current scene in elementary particle physics, the most dominant trend in which is the concept of symmetry. He traced the use of the concept of rotational invariance and symmetry under permutation of identical objects in the realm of atomic spectra and how, with the inclusion of isotopic spin, such use was extended to the study of properties of nuclei. Professor Weisskopf also described how, in ad dition, elementary particles are characterized by a new quantum number, the hypercharge, which, with isotopic spin, is part of a wider symmetry SU(3). He mentioned three classes of experiments at CERN, one in search of quarks, one to investigate the existence of vector bosons suggested by theories as possible mediators of weak interaction, and one to test the existence of cosmic forces to explain C P or T violation. The quotations from Newton’s Opticks at the beginning and the end of the lecture were strikingly relevant. Two lectures dealt with the application of SU(3) symmetry to weak and strong interactions, respectively. Ph. Meyer of the Uni versity of Paris, Orsay summarized his work on the conserved vector current hypothesis in relation to broken symmetries.

Free Download Symposia on Theoretical Physics 3: Lectures presented at the 1964 Summer School of the Institute of Mathematical Sciences Madras, India By Reinhard Oehme (auth.), Alladi Ramakrishnan (eds.)
1995 | 180 Pages | ISBN: 1468477579 | PDF | 6 MB
The third volume of the series entitled "Symposia on Theoretical Physics" comprises the lectures delivered at the First Matscience Summer School on Theoretical Physics held in Bangalore for three weeks from August 24 to September 13, 1964. The academic program of the summer school consisted mainly of several invited lectures by both foreign and Indian scientists. Among the participants were the following: Professor R. Oehme, University of Chicago (United States); Professor K. Symanzik, New York Uni versity (United States); Professor E. R. Caianiello, Director, Institute for Theoretical Physics, Naples (Italy); Professor W. Brenig, Max Planck Institute (West Germany); Professor F. Calogero, University of Rome (Italy); Dr. A. Fujii, School of Science and Technology, Sophia University (Japan); Dr. J. Lukierski, University of Wroclaw (Poland). All were visiting scientists at Matscience. It was a very fortunate circumstance that this summer school was held immediately after the International Conference on High-Energy Physics at Dubna, U .S.S.R. Among the various topics discussed at the Dubna Conference, of particular interest is the reported violation of CP invariance and, hence, the violation also of time reversal ( T) invariance in some weak interactions as well as successful demonstra tion of SU 3 symmetry of elementary particle interactions. These were summarized by Professor Ramakrishnan who had attended the Dubna Conference.

Free Download Finitely Presented Groups
by Volker Diekert, Martin Kreuzer
English | 2024 | ISBN: 3111473376 | 252 pages | True PDF EPUB | 24.53 MB

Free Download Engineering Formulas for Metalcutting – Presented in Customary U.S. and Metric Units of Measure By Isakov, Edmund
2004 | 225 Pages | ISBN: 0831131748 | PDF | 5 MB
A unique and handy resource, this book will enable users to calculate necessary speeds, feeds, and required machining power in order to maximize the productivity of cutting. Providing information on formulas and their applications in a concise and clearly arranged format, it describes mechanical properties of the most popular work materials, such as steels, cast irons, and nonferrous alloys. And it offers numerous formulas for calculating speeds, feeds, cutting forces, and machining power. What’s more, practical examples of calculating the variety of such cutting parameters will make this a valuable source of knowledge in training and practice. Content: Front Matter • Preface • Table of Contents 1. Mechanical Properties of Work Materials 2. Milling 3. Turning 4. Boring 5. Drilling • Afterword • References Index