A lower bound for the positive real roots of a polynomial

11.3.4 A lower bound for the positive real roots of a polynomial

The poslbdLMQ command uses the Local Max Quadratic (LMQ) Akritas-Strzebonski-Vigklas algorithm to find lower bounds for the positive real roots of polynomials.

poslbdLMQ takes P, a polynomial.
poslbdLMQ(P) returns a (non-optimal) lower bound for the positive real roots of P.

Examples

poslbdLMQ(x^3-7*x+7)

poslbdLMQ(x^5+2*x^4-6*x^3-7*x^2+7*x+7)

poslbdLMQ(x^3-x^2-2*x+2)