# hasRationalSing(List) -- check if a complete intersection has at most rational singularities

## Synopsis

• Function: hasRationalSing
• Usage:
b = hasRationalSing F
• Inputs:
• F, a list, a regular sequence (of polynomials)
• Outputs:
• b, , answers: are the singularities of the given variety at most rational?

## Description

 i1 : R = QQ[x_1..x_4]; i2 : multiplierIdeal(ideal {x_1^3 - x_2^2, x_2^3 - x_3^2}, 31/18) 2 2 o2 = ideal (x , x , x x , x ) 3 2 1 2 1 o2 : Ideal of R