One SIGN, different paths
نویسندگان
چکیده
منابع مشابه
Osculating Lattice Paths and Alternating Sign Matrices
Osculating lattice paths are sets of directed lattice paths which are not allowed to cross or have common edges, but are allowed common vertices. We derive a constant term formula for the number of such lattice paths. The formula is obtained by solving a set of simultaneous recurrence relations. Alternating sign matrices are in simple bijection with a subset of osculating lattice paths. This le...
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We study sums of directed paths on a hierarchical lattice where each bond has either a positive or negative sign with a probability p. Such path sums J have been used to model interference effects by hopping electrons in the strongly localized regime. The advantage of hierarchical lattices is that they include path crossings, ignored by mean field approaches, while still permitting analytical t...
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ژورنال
عنوان ژورنال: Nature Reviews Immunology
سال: 2009
ISSN: 1474-1733,1474-1741
DOI: 10.1038/nri2640