How to delete some columns?

Question:How to delete some columns?

Posted: farzane 35 Product: Maple

September 13 2015

dear all

how do i do for deletion of some columns? example:

A:=Matrix([[1,2,3],[4,5,6],]);

change to this: A:=Matrix([[1,2],[4,5]]).

i have a Matrix 8*12 and i want change it to 8*8

plz help me.

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