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1. |
Record Nr. |
UNINA9910457823103321 |
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Autore |
Avery John <1933-> |
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Titolo |
Symmetry-adapted basis sets [[electronic resource] ] : automatic generation for problems in chemistry and physics / / John Scales Avery, Sten Rettrup, James Emil Avery |
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Pubbl/distr/stampa |
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Singapore, : World Scientific, c2012 |
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ISBN |
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Descrizione fisica |
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1 online resource (239 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Symmetry (Physics) |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Contents; Preface; 1. GENERAL CONSIDERATIONS; 1.1 The need for symmetry-adapted basis functions; 1.2 Fundamental concepts; 1.3 Definition of invariant blocks; 1.4 Diagonalization of the invariant blocks; 1.5 Transformation of the large matrix to block-diagonal form; 1.6 Summary of the method; 2. EXAMPLES FROM ATOMIC PHYSICS; 2.1 The Hartree-Fock-Roothaan method for calculating atomic orbitals; 2.2 Automatic generation of symmetry-adapted configurations; 2.3 Russell-Saunders states; 2.4 Some illustrative examples; 2.5 The Slater-Condon rules |
2.6 Diagonalization of invariant blocks using the Slater-Condon rules3. EXAMPLES FROM QUANTUM CHEMISTRY; 3.1 The Hartree-Fock-Roothaan method applied to molecules; 3.2 Construction of invariant subsets; 3.3 The trigonal group C3v; the NH3 molecule; 4. GENERALIZED STURMIANS APPLIED TO ATOMS; 4.1 Goscinskian configurations; 4.2 Relativistic corrections; 4.3 The large-Z approximation: Restriction of the basis set to an R-block; 4.4 Electronic potential at the nucleus in the large-Z approximation; 4.5 Core ionization energies; 4.6 Advantages and disadvantages of Goscinskian configurations |
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4.7 R-blocks, invariant subsets and invariant blocks4.8 Invariant subsets based on subshells; Classification according to ML and Ms; 4.9 An atom surrounded by point charges; 5. MOLECULAR ORBITALS BASED ON STURMIANS; 5.1 The one-electron secular equation; 5.2 Shibuya-Wulfman integrals and Sturmian overlap integrals evaluated in terms of hyperpherical harmonics; 5.3 Molecular calculations using the isoenergetic configurations; 5.4 Building Tvv(N) and vv(N) from 1-electron components; 5.5 Interelectron repulsion integrals for molecular Sturmians from hyperspherical harmonics |
5.6 Many-center integrals treated by Gaussian expansions (Appendix E)5.7 A pilot calculation; 5.8 Automatic generation of symmetry-adapted basis functions; 6. AN EXAMPLE FROM ACOUSTICS; 6.1 The Helmholtz equation for a non-uniform medium; 6.2 Homogeneous boundary conditions at the surface of a cube; 6.3 Spherical symmetry of v(x); nonseparability of the Helmholtz equation; 6.4 Diagonalization of invariant blocks; 7. AN EXAMPLE FROM HEAT CONDUCTION; 7.1 Inhomogeneous media; 7.2 A 1-dimensional example; 7.3 Heat conduction in a 3-dimensional inhomogeneous medium |
8. SYMMETRY-ADAPTED SOLUTIONS BY ITERATION8.1 Conservation of symmetry under Fourier transformation; 8.2 The operator - + p2k and its Green's function; 8.3 Conservation of symmetry under iteration of the Schrodinger equation; 8.4 Evaluation of the integrals; 8.5 Generation of symmetry-adapted basis functions by iteration; 8.6 A simple example; 8.7 An alternative expansion of the Green's function that applies to the Hamiltonian formulation of physics; Appendix A REPRESENTATION THEORY OF FINITE GROUPS; A.1 Basic definitions; A.2 Representations of geometrical symmetry groups |
A.3 Similarity transformations |
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Sommario/riassunto |
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In theoretical physics, theoretical chemistry and engineering, one often wishes to solve partial differential equations subject to a set of boundary conditions. This gives rise to eigenvalue problems of which some solutions may be very difficult to find. For example, the problem of finding eigenfunctions and eigenvalues for the Hamiltonian of a many-particle system is usually so difficult that it requires approximate methods, the most common of which is expansion of the eigenfunctions in terms of basis functions that obey the boundary conditions of the problem. The computational effort needed |
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2. |
Record Nr. |
UNINA9910830566503321 |
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Autore |
Schaeffer Mary S |
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Titolo |
Fraud in accounts payable [[electronic resource] ] : how to prevent it / / Mary S. Schaeffer |
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Pubbl/distr/stampa |
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Hoboken, N.J., : John Wiley & Sons, c2008 |
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ISBN |
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0-470-43531-3 |
1-119-19722-8 |
1-282-36785-4 |
9786612367854 |
0-470-39127-8 |
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Descrizione fisica |
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1 online resource (226 p.) |
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Classificazione |
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Disciplina |
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Soggetti |
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Accounts payable - Auditing |
Auditing, Internal |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references (p. 191-193) and index. |
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Nota di contenuto |
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FRAUD IN ACCOUNTS PAYABLE: HOW TO PREVENT IT; CONTENTS; PREFACE; ACKNOWLEDGMENTS; Part I: WHERE ACCOUNTS PAYABLE FRAUD CAN HAPPEN IN YOUR ORGANIZATION; Chapter 1: PROFILES OF FRAUD IN THE BUSINESS WORLD; Chapter 2: CHECK FRAUD: STILL A HUGE PROBLEM; Chapter 3: CHECK STOCK: STOP THE FRAUDSTERS' PRESSES; Chapter 4: P-CARD: NOT AS BIG AN ISSUE AS YOU MIGHT THINK; Chapter 5: ELECTRONIC PAYMENT FRAUD: NOT A GROWTH INDUSTRY-YET!; Chapter 6: DESKTOP FRAUD: FEW THINK ABOUT THIS-BUT EVERYONE SHOULD; Chapter 7: TRAVEL AND ENTERTAINMENT FRAUD: NOT ALL YOUR EMPLOYEES ARE HONEST |
Chapter 8: PETTY CASH FRAUD: PETTY INDEEDChapter 9: VENDOR AND INVOICE FRAUD: NOT EVERY INVOICE (OR VENDOR!) IS LEGIT; Chapter 10: MASTER VENDOR FILE FRAUD: HOW EMPLOYEES PLAY GAMES WITH YOUR RECORDS; Chapter 11: PAYROLL FRAUD: GHOSTBUSTING AND MORE; Chapter 12: TELECOM FRAUD: YES, IT CAN HAPPEN TO YOU; Part II: STRATEGIES TO DETER, PREVENT, AND DETECT ALL SORTS OF ACCOUNTS PAYABLE FRAUD; Chapter 13: BEST PRACTICES-NOT: |
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TACTICS THAT UNINTENTIONALLY PROMOTE FRAUD; Chapter 14: FRAUD MONITORING REPORTS: A NECESSARY EVIL; Chapter 15: FRAUD DETECTION AND PREVENTION: SIMPLE TACTICS YOU CAN USE |
Chapter 16: SARBANES-OXLEYAppendix A: FRAUD SCHEMES: PHYSICAL AND VIRTUAL CHECKS; Appendix B: 2007 TOP FRAUDS; Appendix C: SEGREGATION OF DUTIES; Appendix D: THE SARBANES-OXLEY ACT OF 2002 TITLES; RESOURCES; INDEX |
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Sommario/riassunto |
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Praise for Fraud in Accounts Payable ""Fraud in Accounts Payable is an insightful book that takes an in-depth look at the three most frequently committed fraudulent cash disbursement schemes directly related to your accounts payable function. Mary provides colorful and poignant stories showing how easy it can be to steal from both within and outside an organization. But the real beauty of this book is that Mary illustrates ways you can immediately begin implementing effective and efficient controls to reduce the opportunities for fraud within your organization.""-Mat |
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3. |
Record Nr. |
UNISANNIOCFI0153635 |
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Titolo |
L'amministrazione delle imprese edili : manuale ad uso di imprenditori, dirigenti e amministratori di imprese edili, di cooperative edilizie : aggiornato con il T.U. delle imposte sui redditi e con le più recenti risoluzioni e circolari ministeriali / Adriano Propersi |
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Pubbl/distr/stampa |
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ISBN |
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Edizione |
[6. ed] |
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Descrizione fisica |
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Collana |
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Soggetti |
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Imprese edili - Amministrazione |
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Collocazione |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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