1,475 research outputs found
Cohomology and profinite topologies for solvable groups of finite rank
Assume is a solvable group whose elementary abelian sections are all
finite. Suppose, further, that is a prime such that fails to contain
any subgroups isomorphic to . We show that if is nilpotent,
then the pro- completion map induces an isomorphism
for any discrete -module of
finite -power order. For the general case, we prove that contains a
normal subgroup of finite index such that the map is an isomorphism for any discrete -module of
finite -power order. Moreover, if lacks any -sections, the
subgroup enjoys some additional special properties with respect to its
pro- topology.Comment: This paper supersedes arXiv:1009.2645v5: the two theorems in the
introduction to the latter paper are both corollaries to Theorem 1.1 in the
present paper. In the second version, Theorem 1.1 is expressed in a slightly
more general form than in the first versio
Groups with the same cohomology as their pro- completions
For any prime and group , denote the pro- completion of by
. Let be the class of all groups such that, for
each natural number and prime number , , where is viewed as a discrete, trivial
-module. In this article we identify certain kinds of groups that
lie in . In particular, we show that right-angled Artin groups are
in and that this class also contains some special types of free
products with amalgamation.Comment: The revisions in the second version pertain to the exposition: the
proof of Prop. 1.1, in particular, now includes more details. The third
version includes a proof that right-angled Artin groups are residually
-finite for every prime $p
The quarter-point quadratic isoparametric element as a singular element for crack problems
The quadratic isoparametric elements which embody the inverse square root singularity are used for calculating the stress intensity factors at tips of cracks. The strain singularity at a point or an edge is obtained in a simple manner by placing the mid-side nodes at quarter points in the vicinity of the crack tip or an edge. These elements are implemented in NASTRAN as dummy elements. The method eliminates the use of special crack tip elements and in addition, these elements satisfy the constant strain and rigid body modes required for convergence
Illustrations of accounting for postemployment benefits : a survey of the application of FASB statement no. 112; Financial report survey, 54
https://egrove.olemiss.edu/aicpa_news/1216/thumbnail.jp
Illustrations of disclosures about fair value of financial instruments : a survey of the application of FASB statement no. 107; Financial report survey, 53
https://egrove.olemiss.edu/aicpa_news/1215/thumbnail.jp
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