From Greek theōrēma 'something to be contemplated,' from theōrein 'to look at'—sharing its root with 'theater.'
A statement in mathematics or logic that has been proven true by a chain of reasoning from axioms and previously established theorems.
From Greek theōrēma 'speculation, proposition to be proved,' from theōrein 'to look at, consider,' from theōros 'spectator,' from thea 'a view' + horan 'to see.' A theorem is literally 'something to be contemplated'—an intellectual spectacle to be witnessed through reasoning. Key roots: *dʰeh₁- (Proto-Indo-European: "to see, look at").