منابع مشابه
On the Pólya Enumeration Theorem
Simple formulas for the number of different cyclic and dihedral necklaces containing nj beads of the j-th color, j ≤ m and ∑m j=1 nj = N , are derived. Among a vast number of counting problems one of the most popular is a necklace enumeration. A cyclic necklace is a coloring in m colors of the vertices of a regular N–gon, where two colorings are equivalent if one can be obtained from the other ...
متن کاملLevinson-like theorem for scattering from a Bose-Einstein condensate.
A relation between the number of bound elementary excitations of an atomic Bose-Einstein condensate and the phase shift of elastically scattered atoms is derived. Within the Bogoliubov model of a weakly interacting Bose gas this relation is exact and generalizes Levinson's theorem. Specific features of the Bogoliubov model such as complex energy and continuum bound states are discussed and a nu...
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If at least some Wheeler-DeWitt solutions can be interpreted as zero-energy resonances then the total s-wave cross section of the corresponding quantum universes is infinite. The present, common 'quantum' cosmological framework is based on the Wheeler-DeWitt equation, which being a 'stationary', zero-energy differential equation appears to have no obvious time dependence and therefore forcing o...
متن کامل0 Fractional and Integer Charges from Levinson ’ s Theorem
We compute fractional and integer fermion quantum numbers of static background field configurations using phase shifts and Levinson’s theorem. By extending fermionic scattering theory to arbitrary dimensions, we implement dimensional regularization in a 1 + 1 dimensional gauge theory. We demonstrate that this regularization procedure automatically eliminates the anomaly in the vector current th...
متن کاملon translation of politeness strategies in dialogues involving female characters in translations and retranslations of novels translated before and after the islamic revolution of iran and their effects on the image of women: a polysystem theory approach
abstract reception environment has considerable effects on accepting a translation. as the expectations of a target culture and its values and needs change throughout history, its criteria for accepting a translation or rejecting it will change accordingly (gentzler, 2001). the expectations of iran, as the reception environment in the present study, have changed after the islamic revolution. i...
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ژورنال
عنوان ژورنال: Journal of Mathematical Analysis and Applications
سال: 1994
ISSN: 0022-247X
DOI: 10.1006/jmaa.1994.1142