In this paper we deal with the symmetry group S f of a boolean function f on n-variables, that is, the set of all permutations on n elements which leave f invariant. The main problem is that of concrete representation: which permutation ลฝ . groups on n elements can be represented as G s S f for some
On the construction of double group molecular symmetry functions
โ Scribed by Lucas Visscher
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 485 KB
- Volume
- 253
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
A new procedure for constructing double group symmetry functions is presented. Using this method integrals over Hermitian operators can become real quantities, even though the integrand and the functions themselves are complex. This is especially of interest to 4-component relativistic methods that use the Dirac-Coulomb Hamiltonian directly in electronic structure calculations.
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