bicanonical

bi- +‎ canonical

bicanonical (not comparable)

1. (mathematics) Canonical on both the left and the right.
   • 2015, Filippo F. Favale, Roberto Pignatelli, “A parabicanonical system with base points”, in arXiv‎:

     Inspired by this description, we reduced the problem of constructing a minimal surface of general type with ${\displaystyle K^{2}=3}$ whose bicanonical system has base points, under some reasonable assumptions, to the problem of constructing a curve in ${\displaystyle {\mathbb {P} }^{3}}$ with certain properties..