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lambda -- Chern class of the Hodge bundle

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

See also

For the programmer

The object lambda is an indexed variable table.

The source of this document is in HodgeIntegrals.m2:762:0.