Description
This is an element in the ring created by
hodgeRing. It is the $a$-th graded part of the Chern character of the Hodge bundle on ${\bar M}_{g,n}$.
Examples
Here is a simple example which calculates $\int_{{\bar M}_{1,1}} ch_1$.
i1 : R = hodgeRing (1, 1);
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i2 : ch_1
o2 = ch
1
o2 : R
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i3 : integral(1, 1, ch_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
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