### 171549 results

Contributors: George Delic, Gordon G. Cash

Date: 2019-12-05

... Abstract The Kallman algorithm for the computation of the permanent, per(A), of a matrix A has been ported to the Cray C90, tested on other platforms, and compared against several alternative algorithms. This report presents results of these comparisons for test cases where the permanent is known and also for cases of the adjacency matrix taken from molecular chemistry applications. The accompanying code includes both C90 and Personal Computer versions of the Kallman algorithm, and these have been eva... Title of program: KALLC90 and KALLPC Catalogue Id: ADLC_v1_0 Nature of problem Numerical evaluation of the permanent of a 0,1 matrix. Versions of this program held in the CPC repository in Mendeley Data ADLC_v1_0; KALLC90 and KALLPC; 10.1016/S0010-4655(99)00448-8 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: D.Yu. Bardin, M.S. Bilenky, T. Riemann, M. Sachwitz, H. Vogt, P.Ch. Christova

Date: 2019-12-05

... Abstract The use of five gauge invariant form factors allows a dense notation of electroweak one-loop effects for the fermion pair production in e^+ e^-annihilation. Based on this notation a program package (DIZET) has been developed to calculate the differential cross section for these processes. It is evaluated as a function of the energy of the process, the production angle, the longitudinal polarization of the beam particles, and the helicities of the final fermions. Title of program: DIZET Catalogue Id: ABRL_v1_0 Nature of problem The shape of the Z0 peak in e+e- annihilation is influenced by radiative corrections, among them the weak one-loop insertions. These are calculated in the standard electroweak theory. Derived quantities may also be calculated, e.g. the forward-backward asymmetry, the left- right asymmetry, and the final state polarization. Versions of this program held in the CPC repository in Mendeley Data ABRL_v1_0; DIZET; 10.1016/0010-4655(90)90179-5 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: U. Kammerer

Date: 2019-12-05

... Title of program: GINZBURG-LANDAU-FLUXOIDS Catalogue Id: ACKA_v1_0 Nature of problem The Ginzburg-Landau-equations are solved for a straight single fluxoid containing an (integer) number q of flux quanta, starting from an approximate solution which has to be submitted by the user if q > 1. Versions of this program held in the CPC repository in Mendeley Data ACKA_v1_0; GINZBURG-LANDAU-FLUXOIDS; 10.1016/0010-4655(69)90012-5 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: T. Radtke, S. Fritzsche

Date: 2019-12-05

... Abstract Studies on the entanglement of n-qubit quantum systems have attracted a lot of interest during recent years. Despite the central role of entanglement in quantum information theory, however, there are still a number of open problems in the theoretical characterization of entangled systems that make symbolic and numerical simulation on n-qubit quantum registers indispensable for present-day research. To facilitate the investigation of the separability and entanglement properties of n-qubit qua... Title of program: FEYNMAN Catalogue Id: ADWE_v2_0 Nature of problem Entanglement has been identified as an essential resource in virtually all aspects of quantum information theory. Therefore, the detection and quantification of entanglement is a necessary prerequisite for many applications, such as quantum computation, communications or quantum cryptography. Up to the present, however, the multipartite entanglement of n-qubit systems has remained largely unexplored owing to the exponential growth of complexity with the number of qubits involved. Versions of this program held in the CPC repository in Mendeley Data ADWE_v1_0; FEYNMAN; 10.1016/j.cpc.2005.07.006 ADWE_v2_0; FEYNMAN; 10.1016/j.cpc.2006.03.006 ADWE_v3_0; FEYNMAN; 10.1016/j.cpc.2007.02.106 ADWE_v4_0; FEYNMAN; 10.1016/j.cpc.2008.06.007 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: M.F. Soto, R. Mirman

Date: 2019-12-05

... Title of program: ORTHNRM Catalogue Id: AAMG_v1_0 Nature of problem To check that the states produced by SYMSTATS form an orthonormal set. Versions of this program held in the CPC repository in Mendeley Data aamg_v1_0; ORTHNRM; 10.1016/0010-4655(81)90132-6 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: M.F. Soto, R. Mirman

Date: 2019-12-05

... Title of program: SYMGRPTB Catalogue Id: AAMC_v1_0 Nature of problem To find explicitly the generators (permutations), and group multiplication tables for the symmetric groups. Versions of this program held in the CPC repository in Mendeley Data aamc_v1_0; SYMGRPTB; 10.1016/0010-4655(81)90131-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: R.D. Kent, M. Schlesinger

Date: 2019-12-05

... Abstract Title of programs: GENDRT, DRTDIM Catalogue number: AATF Program obtainable from: CPC Program Library, Queen's University of Belfast, N. Ireland (see application form in this issue) Computer: IBM PC, PC/XT, PC/AT; Installation: University of Windsor Operating system: MS-DOS (PC-DOS) version 2.1 or higher Programming language used: Pascal High speed storage required: GENDRT - 128 Kwords minimum, DRTDIM - 128 Kwords minimum Number of bits in a word: 16 Peripherals used: video terminal, floppy o... Title of program: GENDRT, DRTDIM Catalogue Id: AATF_v1_0 Nature of problem For the purpose of computing matrix elements of quantum mechanical operators in complex N-particle systems it is necessary that as much of each irreducible representation be stored in high-speed memory as possible inorder to achieve the highest possible rate of computations. A graph theoretic approach to the representation of N-particle systems involving arbitrary single-particle spin is presented. The method involves a generalization of a technique employed by Shavitt in developing the graphica ... Versions of this program held in the CPC repository in Mendeley Data AATF_v1_0; GENDRT, DRTDIM; 10.1016/0010-4655(87)90058-0 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: A.I. Shestakov, D.V. Anderson

Date: 2019-12-05

... Title of program: ILUCG2 Catalogue Id: ACEU_v1_0 Nature of problem Elliptic and parabolic partial differential equations which arise in plasma physics applications (as well as in others) are solved in two dimensions. Plasma diffusion, equilibria, and phase space transport (Fokker-Planck equation) have been treated by these methods. These problems share the common feature of being stiff and requiring implicit solution techniques. Generally, the resulting matrix equations are asymmetric; we solve them here with the ILUCG2 program. In a subsequent article we descr ... Versions of this program held in the CPC repository in Mendeley Data ACEU_v1_0; ILUCG2; 10.1016/0010-4655(83)90119-4 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2019)

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Contributors: Evgeny Z. Liverts, Nir Barnea

Date: 2019-12-05

... Abstract A simple Mathematica (version 7) code for computing S-state energies and wave functions of two-electron (helium-like) ions is presented. The elegant technique derived from the classical papers of Pekeris is applied. The basis functions are composed of the Laguerre functions. The method is based on the perimetric coordinates and specific properties of the Laguerre polynomials. Direct solution of the generalized eigenvalues and eigenvectors problem is used, distinct from the Pekeris works. No s... Title of program: TwoElAtomSL(SH) Catalogue Id: AEHY_v2_0 Nature of problem The Schrödinger equation for atoms (ions) with more than one electron has not been solved analytically. Approximate methods must be applied in order to obtain the wave functions or other physical attributes from quantum mechanical calculations. Versions of this program held in the CPC repository in Mendeley Data AEHY_v1_0; TwoElAtomSL(SH); 10.1016/j.cpc.2010.11.031 AEHY_v2_0; TwoElAtomSL(SH); 10.1016/j.cpc.2011.11.001 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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Contributors: George Marsaglia, B. Narasimhan, Arif Zaman

Date: 2019-12-05

... Abstract It is now possible to do serious scientific work on personal computers (PC's). Many simulation studies, whether exploratory or for production runs, call for random numbers. We offer here a new kind of random number generator with implementation tailored specifically for PC's using Intel 8088/8086 or 80286/80386 processors. A floating-point coprocessor is not required or even useful for the generator, although, of course, a coprocessor may help other parts of a simulation. The generator has an... Title of program: ACARRYPC Catalogue Id: ABTL_v1_0 Nature of problem Any Monte Carlo calculation requiring a uniform random number generator. Versions of this program held in the CPC repository in Mendeley Data ABTL_v1_0; ACARRYPC; 10.1016/0010-4655(90)90033-W This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)

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