genericMatrix

genericMatrix(R,x,m,n) -- produce an m by n matrix of variables drawn from the ring R, starting with variable x.

i1 : R = ZZ/101[a..d]

o1 = R

o1 : PolynomialRing
i2 : genericMatrix(R,a,2,2)

o2 = {0} | a c |
     {0} | b d |

             2       2
o2 : Matrix R  <--- R

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