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D.5.18.9 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).