A commutation theorem and duality for free Bose fields
β Scribed by Marc A. Rieffel
- Publisher
- Springer
- Year
- 1974
- Tongue
- English
- Weight
- 681 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0010-3616
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π SIMILAR VOLUMES
## Abstract A generalized type of graph covering, called a βWrapped quasicoveringβ (wqc) is defined. If __K, L__ are graphs dually embedded in an orientable surface __S__, then we may lift these embeddings to embeddings of dual graphs KΜ,LΜ in orientable surfaces SΜ, such that SΜ are branched cover
## Abstract Let __Q__ be a nonβdegenerate quadric defined by a quadratic form in the finite projective space PG(__d,q__). Let __r__ be the dimension of the generators of __Q__. For all __k__ with 2 β€ __k__ < __r__ we determine the smallest cardinality of a set __B__ of points with the property that