euler(AbstractVariety)

• Function: euler

• Usage:

  euler X

• Inputs:
  • X, an abstract variety,
• Outputs:
  • an integer, the topological Euler characteristic of the variety X

i1 : euler abstractProjectiveSpace 5

o1 = 6

i2 : euler flagBundle {1,1,1,1,1}

o2 = 120