X, Y and Z

Author: Dermot Turing
Publisher: The History Press
ISBN: 075098967X
Category : Biography & Autobiography
Languages : en
Pages : 369

Book Description
December, 1932 In the bathroom of a Belgian hotel, a French spymaster photographs top-secret documents – the operating instructions of the cipher machine, Enigma. A few weeks later a mathematician in Warsaw begins to decipher the coded communications of the Third Reich and lays the foundations for the code-breaking operation at Bletchley Park. The co-operation between France, Britain and Poland is given the cover-name 'X, Y & Z'. December, 1942 It is the middle of World War Two. The Polish code-breakers have risked their lives to continue their work inside Vichy France, even as an uncertain future faces their homeland. Now they are on the run from the Gestapo. People who know the Enigma secret are not supposed to be in the combat zone, so MI6 devises a plan to exfiltrate them. If it goes wrong, if they are caught, the consequences could be catastrophic for the Allies. Based on original research and newly released documents, X, Y & Z is the exhilarating story of those who risked their lives to protect the greatest secret of World War Two.

My "x, Y, Z" Book

Author: Jane Belk Moncure
Publisher:
ISBN: 9780717265237
Category : Alphabet
Languages : en
Pages : 32

Book Description
A little boy fills his sound box with words beginning with the letters "x, y, z."

Legends of X Y & Z

Author: Ida Rose
Publisher: Ida Rose
ISBN: 9780578888514
Category :
Languages : en
Pages : 120

Book Description
Ziara Stanton and her friends have been waiting a long time for this package, but when it finally arrives, they discover it was more trouble than they had bargained for. After trying out a brand new way to play their favorite game, they find that they have landed in an entirely different world with talking mobs, unhappy pillagers, and an unnerving amount of charged creepers. X, Y and Z love to play the game, but can they handle being in it?

Discrete Structures

Author: Satinder Bal Gupta
Publisher: Laxmi Publications
ISBN: 9789380386355
Category : Algebra
Languages : en
Pages : 652

Book Description
This book has been written according to the latest syllabi for B. Tech. & M.C.A. courses of Punjab Technical University and other technical universities of India. The previous years' university questions papers have been solved systematically and logically in each chapter. It is intended to help students better understand the concepts and ideas of discrete structures.

Modern Coding Theory

Author: Tom Richardson
Publisher: Cambridge University Press
ISBN: 1139469649
Category : Technology & Engineering
Languages : en
Pages : 589

Book Description
Having trouble deciding which coding scheme to employ, how to design a new scheme, or how to improve an existing system? This summary of the state-of-the-art in iterative coding makes this decision more straightforward. With emphasis on the underlying theory, techniques to analyse and design practical iterative coding systems are presented. Using Gallager's original ensemble of LDPC codes, the basic concepts are extended for several general codes, including the practically important class of turbo codes. The simplicity of the binary erasure channel is exploited to develop analytical techniques and intuition, which are then applied to general channel models. A chapter on factor graphs helps to unify the important topics of information theory, coding and communication theory. Covering the most recent advances, this text is ideal for graduate students in electrical engineering and computer science, and practitioners. Additional resources, including instructor's solutions and figures, available online: www.cambridge.org/9780521852296.

The Art and Craft of Problem Solving

Author: Paul Zeitz
Publisher: John Wiley & Sons
ISBN: 1119239907
Category : Problem solving
Languages : en
Pages : 389

Book Description
This text on mathematical problem solving provides a comprehensive outline of "problemsolving-ology," concentrating on strategy and tactics. It discusses a number of standard mathematical subjects such as combinatorics and calculus from a problem solver's perspective.

Boolean Algebra and Its Applications

Author: J. Eldon Whitesitt
Publisher: Courier Corporation
ISBN: 0486158160
Category : Mathematics
Languages : en
Pages : 194

Book Description
Introductory treatment begins with set theory and fundamentals of Boolean algebra, proceeding to concise accounts of applications to symbolic logic, switching circuits, relay circuits, binary arithmetic, and probability theory. 1961 edition.

Functional Equations — Results and Advances

Author: Zoltan Daroczy
Publisher: Springer Science & Business Media
ISBN: 9781402004858
Category : Mathematics
Languages : en
Pages : 376

Book Description
The theory of functional equations has been developed in a rapid and productive way in the second half of the Twentieth Century. This is due to the fact that the mathematical applications increased the number of investigations of newer and newer types of functional equations. At the same time, the self-development of this theory was also very fruitful. The material of this volume reflects very well the complexity and applicability of the most active research fields. The results and methods contained give a representative crossection of what is recently happening in the theory of functional equations.

Group Representations

Author:
Publisher: Elsevier
ISBN: 0080872913
Category : Mathematics
Languages : en
Pages : 925

Book Description
This third volume can be roughly divided into two parts. The first part is devoted to the investigation of various properties of projective characters. Special attention is drawn to spin representations and their character tables and to various correspondences for projective characters. Among other topics, projective Schur index and projective representations of abelian groups are covered. The last topic is investigated by introducing a symplectic geometry on finite abelian groups.The second part is devoted to Clifford theory for graded algebras and its application to the corresponding theory for group algebras. The volume ends with a detailed investigation of the Schur index for ordinary representations. A prominant role is played in the discussion by Brauer groups together with cyclotomic algebras and cyclic algebras.

Computers in Nonassociative Rings and Algebras

Author: Robert E. Beck
Publisher: Academic Press
ISBN: 1483267954
Category : Mathematics
Languages : en
Pages : 309

Book Description
Computers in Nonassociative Rings and Algebras provides information pertinent to the computational aspects of nonassociative rings and algebras. This book describes the algorithmic approaches for solving problems using a computer. Organized into 10 chapters, this book begins with an overview of the concept of a symmetrized power of a group representation. This text then presents data structures and other computational methods that may be useful in the field of computational algebra. Other chapters consider several mathematical ideas, including identity processing in nonassociative algebras, structure theory of Lie algebra, and representation theory. This book presents as well an historical survey of the use of computers in Lie algebra theory, with specific reference to computing the coupling and recoupling coefficients for the irreducible representations of simple Lie algebras. The final chapter deals with how representations of semi-simple Lie algebras can be symmetrized in a straightforward manner. This book is a valuable resource for mathematicians.