منابع مشابه
Stably Splitting Bg
In the early nineteen eighties, Gunnar Carlsson proved the Segal conjecture on the stable cohomotopy of the classifying space BG of a finite group G. This led to an algebraic description of the ring of stable self-maps of BG as a suitable completion of the “double Burnside ring”. The problem of understanding the primitive idempotent decompositions of the identity in this ring is equivalent to u...
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All semigroups and monoids except free monoids and free groups are assumed finite in this paper. A monoid M divides a monoid N if M is a quotient of a submonoid of N . The set of idempotents of a monoid M is denoted E(M). The word “variety” will be used for pseudo-variety — that is, a collection of finite monoids closed under division and finite direct product. A block group is a monoid such th...
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The BG-simulation is currently the main tool, short of arguing directly about topology, to show the impossibility of r/w protocol to solve a task T (res) on n processors, t-resiliently. It is done by reducing T (res) from a counterpart task T (wf) on t + 1 processors and showing that T (wf) is not wait-free solvable. The task T (wf) derived from T (res), is driven by the capability of the BG-si...
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ژورنال
عنوان ژورنال: Bulletin of the American Mathematical Society
سال: 1996
ISSN: 0273-0979
DOI: 10.1090/s0273-0979-96-00656-8