hirzebruchFan -- the fan of the n-th Hirzebruch surface

Synopsis

• Usage:

  F = hirzebruchFan n

• Inputs:
  • n, an integer, positive
• Outputs:
  • F, an instance of the type Fan

Description

Generates the fan of the $n$-th Hirzebruch surface.

i1 : F = hirzebruchFan 3

o1 = F

o1 : Fan

i2 : rays F

o2 = | 1 0  0 -1 |
     | 0 -1 1 3  |

              2        4
o2 : Matrix ZZ  <--- ZZ

See also

• Fan -- the class of all fans
• hirzebruch -- computes the fan of the r-th Hirzebruch surface
• pp1ProductFan -- the fan of n products of PP^1
• projectiveSpaceFan -- the fan of projective n space