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D.5.16.9 displayCohom
Procedure from library sheafcoh.lib (see sheafcoh_lib).
- Usage:
- displayCohom(data,l,h,n); data intmat, l,h,n int
- Assume:
h>=l , data is the return value of
sheafCoh(M,l,h) or of sheafCohBGG(M,l,h) , and the
basering has n+1 variables.
- Return:
- none
- Note:
- The intmat is displayed in a diagram of the following form:
| l l+1 h
----------------------------------------------------------
n: h^n(F(l)) h^n(F(l+1)) ...... h^n(F(h))
...............................................
1: h^1(F(l)) h^1(F(l+1)) ...... h^1(F(h))
0: h^0(F(l)) h^0(F(l+1)) ...... h^0(F(h))
----------------------------------------------------------
chi: chi(F(l)) chi(F(l+1)) ...... chi(F(h))
| where F refers to the associated sheaf of M on P^n.
A '-' in the diagram refers to a zero entry, a '*'
refers to a negative entry (= dimension not yet determined).
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