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Macaulay2Doc :: eulers(Ideal)

eulers(Ideal) -- list the sectional Euler characteristics

Synopsis

Description

Computes a list of the successive sectional Euler characteristics of an ideal (sheaf), the i-th entry in the list being the Euler characteristic of the i-th generic hyperplane restriction of I
i1 : R = ZZ/101[a,b,c];
i2 : I =ideal(a^3+b^3+c^3)

            3    3    3
o2 = ideal(a  + b  + c )

o2 : Ideal of R
i3 : eulers I

o3 = {0, 3}

o3 : List

See also