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D.5.5.11 BettiNumsN
Procedure from library goettsche.lib (see goettsche_lib).
- Usage:
- BettiNumsN(q, m, n); q, m, n integers
- Return:
- list of integers
- Purpose:
- computes the Betti numbers of the moduli space
of Kronecker modules N(q; m, n)
- Note:
- if m and n are not coprime, the result does not necessary make sense
Example:
| | LIB "goettsche.lib";
ring r=0, (t), dp;
// get the Betti numbers of N(3; 2, 3)
print( BettiNumsN(3, 2, 3) );
==> [1]:
==> 1
==> [2]:
==> 0
==> [3]:
==> 1
==> [4]:
==> 0
==> [5]:
==> 3
==> [6]:
==> 0
==> [7]:
==> 3
==> [8]:
==> 0
==> [9]:
==> 3
==> [10]:
==> 0
==> [11]:
==> 1
==> [12]:
==> 0
==> [13]:
==> 1
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