lambda -- Chern class of the Hodge bundle

Usage:

lambda_a
Inputs:
- a, an integer
Outputs:
- a ring element

Description

This is an element in the ring created by hodgeRing. It is the $a$-th Chern class of the Hodge bundle on ${\bar M}_{g,n}$.,

Here is a simple example which calculates $\int_{{\bar M}_{1,1}} \lambda_1$.

i1 : R = hodgeRing (1, 1);

i2 : lambda_1

o2 = lambda
           1

o2 : R

i3 : integral(1, 1, lambda_1)
warning: clearing value of symbol tempCh to allow access to subscripted variables based on it
       : debug with expression   debug 1257   or with command line option   --debug 1257

      1
o3 = --
     24

o3 : R

For the programmer

The object lambda is an indexed variable table.

The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/HodgeIntegrals.m2:762:0.

lambda -- Chern class of the Hodge bundle

Description

See also

For the programmer