“Fractional winding numbers” and surface effects
نویسندگان
چکیده
منابع مشابه
Toeplitz operators and mean winding numbers
For a continuous nonvanishing complex-valued function g on the real line, several notions of a mean winding number are introduced. We give necessary conditions for a Toeplitz operator with matrixvalued symbol G to be semi-Fredholm in terms of mean winding numbers of detG. The matrix function G is assumed to be continuous on the real line, and no other apriori assumptions on it are made. AMS Sub...
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3 INFN, Sezione di Pisa, Largo Pontecorvo, 3, Ed. C, 56127 Pisa, Italy 4 Scuola Normale Superiore, Piazza dei Cavalieri, 7, 56100 Pisa, Italy 5 Department of Physics, Keio University, Hiyoshi, Yokohama, Kanagawa 223-8521, JAPAN 6 Department of Physics, Tokyo Institute of Technology Tokyo 152-8551, JAPAN 7 Theoretical Physics Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1977
ISSN: 0370-2693
DOI: 10.1016/0370-2693(77)90772-9