/*
www-ATLAS of Group Representations.
J2 represented as 84 x 84 matrices over GF(2).
*/

F:=GF(2);

x:=CambridgeMatrix(1,F,84,[
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y:=CambridgeMatrix(1,F,84,[
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G<x,y>:=MatrixGroup<84,F|x,y>;
print "Group G is J2 < GL(84,GF(2))";