epigraph

EnglishEdit

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The green set is the epigraph of the blue function

NounEdit

epigraph ‎(plural epigraphs)

  1. an inscription, especially one on a building.
  2. a literary quotation placed at the beginning of a book or other text.
  3. (mathematics, of a function) the set of all points lying on or above the function's graph.

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