
denom - denominator of a rational expression

Calling sequence:

denom(expr)

Parameter:

expr   --  expression

Summary:

denom returns the denominator of the rational expression expr.  expr is
converted to normal form with normal.  The denominator is an expanded
polynomial expression. See function normal .

>>  denom(-3/4);

     4

>>  denom(x + 1/(2/3*x - 2/x));

     2*x^2 - 6

>>  denom((cos(x)^2 - 1) / (cos(x) - 1));

     1

See also:  gcd, normal , numer

