5,865 research outputs found
Groups of type via graphical small cancellation
We construct an uncountable family of groups of type . In contrast to
every previous construction of non-finitely presented groups of type we do
not use Morse theory on cubical complexes; instead we use Gromov's graphical
small cancellation theory.Comment: 3 figures. Second version: two paragraphs added emphasizing the
difference between our construction and Morse theoretic one
Realising fusion systems
We show that every fusion system on a p-group S is equal to the fusion system
associated to a discrete group G with the property that every p-subgroup of G
is conjugate to a subgroup of S
Realising fusion systems
We show that every fusion system (saturated or not) on a p-group S is equal to the fusion system associated to a discrete group G containing S as a subgroup and such that every finite subgroup of G is conjugate to a subgroup of S
Chern classes and extraspecial groups
The mod-p cohomology ring of the extraspecial p-group of exponent p is
studied for odd p. We investigate the subquotient ch(G) generated by Chern
classes modulo the nilradical. The subring of ch(G) generated by Chern classes
of one-dimensional representations was studied by Tezuka and Yagita. The
subring generated by the Chern classes of the faithful irreducible
representations is a polynomial algebra. We study the interplay between these
two families of generators, and obtain some relations between them
Study of materials performance model for aircraft interiors
A demonstration version of an aircraft interior materials computer data library was developed and contains information on selected materials applicable to aircraft seats and wall panels, including materials for the following: panel face sheets, bond plies, honeycomb, foam, decorative film systems, seat cushions, adhesives, cushion reinforcements, fire blocking layers, slipcovers, decorative fabrics and thermoplastic parts. The information obtained for each material pertains to the material's performance in a fire scenario, selected material properties and several measures of processability
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