simplex(R)
simplex(R,Rdual)
Returns a simplex on the variables of R.
If R does not have a coker grading then the standard projective space fan rays are added, see addCokerGrading and raysPPn.
The Option computeFaces=>false suppresses the computation of all faces.
If Rdual is specified it is used for the vertices of the dual simplex, if not a new polynomial ring is created. It is graded by the coordinates of the vertices of the dual simplex.
The dual simplex is always created without face data.
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The object simplex is a method function with options.