منابع مشابه
Phillips gives SLF fans
With dramatic delivery, one of the newest American short story writers read two selec tions from her latest work, Black Tickets, last night in the Library Auditorium. Sensual in nature, both dealt with a char acter’s inner perception of life. Jayne Anne Phillips, at 26 critically acclaimed, spoke to an overflow crowd of 450, as the Sophomore Literary Festival continued. She opened with “ Home...
متن کاملDamselfish are coral fans.
Bustling around their reef homes, Red Sea dascyllus damselfish (Dascyllus marginatus) do quite well out of their co-habiting arrangement with hood coral (Stylophora pistillata). ‘The coral provide the fish with shelter from predators and a place for social interactions and egg laying’, says Nur Garcia-Herrera, from the Alfred-Wegener-Institut, Germany. Yet the agreement isn’t entirely one sided...
متن کاملTraversing Symmetric Polyhedral Fans
We propose an algorithm for computing the facets of a pure connected polyhedral fan up to symmetry. The fan is represented by an oracle. With suitable implementations of the oracle the same algorithm can be used for computing secondary fans, Gröbner fans, Tropical varieties and Minkowski sums up to symmetry. The algorithm has been implemented in the software Gfan.
متن کاملOn fans in multigraphs
We introduce a unifying framework for studying edge-colouring problems on multigraphs. This is defined in terms of a rooted directed multigraph F which is naturally associated to the set of fans based at a given vertex u in a multigraph G. We call F the “Fan Digraph”. We show that fans in G based at u are in one-to-one correspondence with directed trails in F starting at the root of F . We stat...
متن کاملComputing Gröbner fans
This paper presents algorithms for computing the Gröbner fan of an arbitrary polynomial ideal. The computation involves enumeration of all reduced Gröbner bases of the ideal. Our algorithms are based on a uniform definition of the Gröbner fan that applies to both homogeneous and non-homogeneous ideals and a proof that this object is a polyhedral complex. We show that the cells of a Gröbner fan ...
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ژورنال
عنوان ژورنال: Nature
سال: 1920
ISSN: 0028-0836,1476-4687
DOI: 10.1038/105612a0