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- //coff .. resolvent (cofactor method)
- //Calling Sequence
- //[N,d]=coff(M [,var])
- //Arguments
- //M square real matrix
- // var character string
- //N polynomial matrix (same size as M)
- //d polynomial (characteristic polynomial poly(A,'s'))
- //Description
- //coff computes R=(s*eye()-M)^-1 for M a real matrix. R is given by N/d.
- //N = numerator polynomial matrix.
- //d = common denominator.
- //var character string ('s' if omitted)
- M=[1,2;0,3];
- [N,d]=coff(M)
- N/d
- inv(%s*eye()-M)
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