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D.12.8.8 maxabs
Procedure from libraryrootsur.lib (see rootsur_lib).
- Usage:
- maxabs(p); poly p
- Return:
- number: an upper bound for the largest absolute value of a root of p
- Assume:
- p is a univariate polynomial with rational coefficients
LIB "rootsur.lib"; ring r = 0,x,dp; poly p = (x+2)*(x-1)*(x-5); maxabs(p); ==> 11 |