## Abstract We consider a Maxwellβeigenvalue problem on a brick. As is well known, we need to pay special attention to avoiding the soβcalled spurious eigenmodes. We extend the results obtained in (__SIAM J. Numer. Anal.__ 2000; **38**:580β607) to include the use of numerical quadrature. For simpli
A numerical method for evaluating matrix elements of hermitian operators
β Scribed by M Salvetti; R Montagnani; P Riani; O Salvetti
- Publisher
- Elsevier Science
- Year
- 1985
- Tongue
- English
- Weight
- 500 KB
- Volume
- 60
- Category
- Article
- ISSN
- 0021-9991
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
A general algebraic theorem IS presented to calculate the matrLz elements of symmetry operators m a bassls of determlnantal wavefunctlons. It IS also shown how the matrix elements of complementary open-shell wavefunctions are related to each other.
## D A spin-free method is presented for evaluating electronic matrix elements over a spin-independent many-electron Hamiltonian. The spin-adapted basis of configuration state functions is obtained using a nonorthogonal spin basis consisting of projected spin eigenfunctions. The general expression
A polynomial erpansion method is given for the numerical determination of chc cofocrors r,f J ~UZC m~.t+ of rank r. These cofactors xc important quantities for working out hnmiltoninn matris clcmcn[s bet\vccn dctciminzntnl