Next: , Previous: , Up: poly_int   [Contents][Index]


10.6 Computing bounds on poly_ints

poly_int also provides routines for calculating lower and upper bounds:

‘constant_lower_bound (a)’

Assert that a is nonnegative and return the smallest value it can have.

‘lower_bound (a, b)’

Return a value that is always less than or equal to both a and b. It will be the greatest such value for some indeterminate values but necessarily for all.

‘upper_bound (a, b)’

Return a value that is always greater than or equal to both a and b. It will be the least such value for some indeterminate values but necessarily for all.