Dear Forum, I am stuck again :(
Program 1 : ---------------------------------------------- m:=[[1]]; M:=BlockMatrix([[1,2,m],[2,2,m]],2,2); Display(M); M*M; ---------------------------------------------- Result 1 : ------------------------------------------- gap> m:=[[1]]; [ [ 1 ] ] gap> M:=BlockMatrix([[2,2,m],[1,2,m]],2,2); <block matrix of dimensions (2*1)x(2*1)> gap> Display(M); [ [ 0, 1 ], [ 0, 1 ] ] gap> M*M; <block matrix of dimensions (2*1)x(2*1)> ------------------------------------------- Program 2 : -------------------------------------- m:=[[1]]; M:=BlockMatrix([[1,2,m],[2,1,m],[2,2,m]],2,2); Display(M); M*M; -------------------------------------- Result 2 : ---------------------------------------------------- gap> m:=[[1]]; [ [ 1 ] ] gap> M:=BlockMatrix([[2,1,m],[2,2,m],[1,2,m]],2,2); <block matrix of dimensions (2*1)x(2*1)> gap> Display(M); [ [ 0, 1 ], [ 1, 1 ] ] gap> M*M; Error, two blocks for position [2][2] called from BlockMatrix( blocks, bm1!.nrb, bm2!.ncb, bm1!.rpb, bm2!.cpb, bm1!.zero ) called from <function>( <arguments> ) called from read-eval-loop Entering break read-eval-print loop ... you can 'quit;' to quit to outer loop, or you can 'return;' to continue brk> ----------------------------------------------------- What is wrong with Program 2 as opposed to Program 1 ? Anvita _______________________________________________ Forum mailing list [email protected] http://mail.gap-system.org/mailman/listinfo/forum
