lct(Ideal) -- compute the log canonical threshold for an ideal

Synopsis

• Function: lct

• Usage:

  l = lct I

• Inputs:
  • I, an ideal in a polynomial ring
• Optional inputs:
  • Strategy => ..., default value GeneralBernsteinSato, specify strategy for computing lct
• Outputs:
  • l, a ring element, a rational number, the log canonical threshold of I

Description

i1 : QQ[x_1..x_3];

i2 : I = ideal (x_2^2-x_1*x_3, x_1^3-x_3^2);

o2 : Ideal of QQ[x ..x ]
                  1   3

i3 : lct I

     17
o3 = --
     12

o3 : QQ

See also

• bFunction -- b-function
• generalB -- global generalized Bernstein-Sato polynomial