The cohomology of the sporadic group J2 over F3.
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Date
2014-08-19Author
Díaz Ramos, Antonio
Garayalde Ocaña, Oihana
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Forum Mathematicum 28(1) : 77-87 (2016)
Abstract
We describe the cohomology ring H*(J_2; F_3) both as a subring of H*(3_+^{1+2};F_3) and with an abstract presentation. We also give its Poincaré series. Our calculational tool is the first author's spectral sequence for the cohomology of a finite group with a strongly closed p-subgroup.