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.TH denom 8 "April 1993" "Scilab Group" "Scilab Function"
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: rational or polynomial or constant matrix.
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returns the denominator of a rational matrix.
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Since rationals are internally represented as \fVr=list(['r','num','den','dt'],num,den,[])\fR,
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\fVdenom(r\fR) is the same as \fVr(3)\fR or \fVr('den')\fR .