The following data of the GAP package mfer are available in the web. For each sporadic simple group, one page shows an overview of the multiplicity-free permutation modules of this group and its cyclic and bicyclic extensions. The ranks, the dimensions, and the decompositions of the permutation character into irreducible constituents are shown, and PDF files containing the character tables of the endomorphism rings can be opened via hyperlinks in the overview tables.
| M11 | M12 | J1 | M22 | J2 | M23 | 2F4(2)' | HS | J3 |
| M24 | McL | He | Ru | Suz | ON | Co3 | Co2 | Fi22 |
| HN | Ly | Th | Fi23 | Co1 | J4 | F3+ | B | M |
File created on 02-Apr-2008 by Thomas Breuer.
Last modified on 02-Sep-2009 by Thomas Breuer.