Definition for set theory - Oxford Dictionaries Online (World English)

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	set theory (set the¦ory) noun [mass noun] the branch of mathematics which deals with the formal properties of sets as units (without regard to the nature of their individual constituents) and the expression of other branches of mathematics in terms of sets. Derivatives set-theoretic adjective set-theoretical adjective		More words in this category -gon boundary value complement conjugate directrix equivalence class expected utility invariant metric 1 osculate placeholder plane 1 primitive probabilistic raise ratio scalar product trinomial trivial unknown Nearby Words set menu set phrase set piece set play set point set screw set scrum set shot set square set theory set-aside set-in set-net set-off set-to set-top box set-up seta setback