Book
Linear Algebra
Author
Gilbert Strang
Edition
E=([[1,2],[3,8]]) Z=matrix(2,2) var('y') L=matrix([[1,0],[x,1]]) U=matrix([[1,y],[0,2]]) Z=L*U for i in range(2): for j in range (2): Z[i][j]==E[i][j] f=function('f',x) f=L print f(3) f1=function('f1',y) f1=U print f1(2) R=f(3)*f1(2) print R
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