bak@mathematik.uni-bielefeld.de, r.hazrat@qub.ac.uk, nikolai-vavilov@yandex.ru
Submission: 2008, Apr 2
See the paper's abstract as it contains mathematics and references.
2000 Mathematics Subject Classification:
Keywords and Phrases:
Full text: dvi.gz 32 k, dvi 72 k, ps.gz 789 k, pdf.gz 173 k, pdf 198 k.