is_positives: Are these polynomials positive?
In weiyaw/blackbox: A SMC-SA Algorithm for Constrained Optimisation

Description Usage Arguments Details Value

Check if a set of polynomial is positive (or negative) inside a given interval.

1	is_positives(poly_coefs, a, b, positive = TRUE, EPS = 1e-06)

`poly_coefs`	a matrix of polynomial coefficients in ascending order, each column corresponds to a polynomial. (num mat)
`a`	the lower bound. (num)
`b`	the upper bound. (num)
`positive`	if it is `FALSE`, check if the polynomial is negative. (bool)
`EPS`	error tolerance. (num)

This can be done by checking wherether the roots of the polynomials have even multiplicities. In addition, one of the points in the interval must have the desired sign.

a boolean vector indicating whether the condition in the description is met.

weiyaw/blackbox documentation built on June 7, 2019, 5:12 a.m.