Linear precision for toric surface patches
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abstract
We classify the homogeneous polynomials in three variables whose toric polar linear system defines a Cremona transformation. This classification also includes, as a proper subset, the classification of toric surface patches from geometric modeling which have linear precision. Besides the well-known tensor product patches and B'ezier triangles, we identify a family of toric patches with trapezoidal shape, each of which has linear precision. B'ezier triangles and tensor product patches are special cases of trapezoidal patches.
