i1 : A = QQ[x_1..x_3]/ideal(x_1^2, x_1*x_2);
i2 : m = ideal vars A o2 = ideal (x , x , x ) 1 2 3 o2 : Ideal of A
i3 : depth(m,A) o3 = 1
i4 : depth(ideal(1),ZZ) o4 = infinity o4 : InfiniteNumber
This symbol is provided by the package Depth.