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Etymology

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co- +‎ effective

Adjective

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coeffective (not comparable)

  1. (mathematics) effective within a cohomology
    • 2015, Cristian Ida, Paul Popescu, “Coeffective basic cohomologies of  --contact and Sasakian manifolds”, in arXiv[1]:
      Also, in this case, we prove some Hodge decomposition theorems for coeffective basic de Rham cohomology, relating this cohomology with coeffective basic Dolbeault or Bott-Chern cohomology.

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