Konkávní

Konkávní množina

Jako konkávní (vydutý) se označují (například v matematice nebo optice) takové formy (plochy nebo křivky), které jsou vyduté směrem dovnitř[zdroj?].

Formy, které jsou vyklenuté směrem ven (tj. vypuklé), se označují jako konvexní.

Označení konkávní se používá například

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