source(MultirationalMap) -- the source for a multi-rational map

Synopsis

• Function: source

• Usage:

  source Phi

• Inputs:
  • Phi, a multi-rational map
• Outputs:
  • a multi-projective variety, the source of Phi

Description

Note that, instead, the source of a standard rational map is the coordinate ring of the source variety (this is done mainly for efficiency reasons).

See also

• target(MultirationalMap) -- the target for a multi-rational map
• entries(MultirationalMap) -- list the defining polynomials of a rational map