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Etymology edit

pseudo- +‎ effective

Adjective edit

pseudoeffective (not comparable)

  1. (mathematics) Having a nonnegative intersection product with every ample divisor and numerically eventually free if the intersection product with every positive divisor is non-negative.
    • 2015, Brian Harbourne, Piotr Pokora, Halszka Tutaj-Gasińska, “On integral Zariski decompositions of pseudoeffective divisors on algebraic surfaces”, in arXiv[1]:
      In this note we consider the problem of integrality of Zariski decompositions for pseudoeffective integral divisors on algebraic surfaces.