5 citations · 8 across the 4 of their papers we have counts for
10 papers
Theorem of Levinson Via The Spectral Density
L. J. Boya, J. Casahorran
We deduce Levinson\'{}s theorem in non-relativistic quantum mechanics in one dimension as a sum rule for the spectral density constructed from asymptotic data. We assume a self-adj…
Spinors and Octonions
Luis J. Boya
Octonions are introduced through some spin representations. The groups , and the series appear in a natural manner; one way to understand octonions is as the "second…
The Thermal Radiation Formula of Planck (1900)
Luis J. Boya
We review the derivation of Planck's Radiation Formula on the light of recent studies in its centenary. We discuss specially the issue of discreteness, Planck's opinion on his disc…
Obstructions, Extensions and Reductions. Some applications of Cohomology
Luis J. Boya
After introducing some cohomology classes as obstructions to orientation and spin structures etc., we explain some applications of cohomology to physical problems, in special to re…
Octonions and M-theory
Luis J. Boya
We explain how structures related to octonions are ubiquitous in M-theory. All the exceptional Lie groups, and the projective Cayley line and plane appear in M-theory. Exceptional…
Deduction of Planck's Formula from Multiphoton States
Luis J. Boya, Ian M. Duck, E. C. G. Sudarshan
We obtain the black body radiation formula of Planck by considering independent contributions of multiphoton states