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GAP 4.8.9 installation with standard packages -- copy to your CoCalc project to get it
Project: cocalc-sagemath-dev-slelievre
Views: 418346############################################################################# ## #W eigen.tst GAP library Gene Cooperman #W and Scott Murray ## ## #Y Copyright (C) 1998, Lehrstuhl D für Mathematik, RWTH Aachen, Germany ## ## Exclude from testinstall.g: why? ## gap> START_TEST("eigen.tst"); gap> A := GL(4,3).1; [ [ Z(3), 0*Z(3), 0*Z(3), 0*Z(3) ], [ 0*Z(3), Z(3)^0, 0*Z(3), 0*Z(3) ], [ 0*Z(3), 0*Z(3), Z(3)^0, 0*Z(3) ], [ 0*Z(3), 0*Z(3), 0*Z(3), Z(3)^0 ] ] gap> CharacteristicPolynomial( A ); x_1^4+x_1^3-x_1-Z(3)^0 gap> GeneralisedEigenvalues(GF(3), A ); [ x_1+Z(3)^0, x_1-Z(3)^0 ] gap> GeneralisedEigenspaces(GF(3),A); [ <vector space over GF(3), with 1 generators>, <vector space over GF(3), with 3 generators> ] gap> STOP_TEST( "eigen.tst", 380000); ############################################################################# ## #E