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2. File:Venn1011.svg - Wikipedia

   en.wikipedia.org/wiki/File:Venn1011.svg

   In set theory the Venn diagrams tell, that there is an element in one of the red intersections. (The existential quantifications for the red intersections are combined by or. They can be combined by the exclusive or as well.) Relations like subset and implication, arranged in the same kind of matrix as above. In set theory the Venn diagrams tell,

3. Venn diagram - Wikipedia

   en.wikipedia.org/wiki/Venn_diagram

   A Venn diagram, also called a set diagram or logic diagram, shows all possible logical relations between a finite collection of different sets. These diagrams depict elements as points in the plane, and sets as regions inside closed curves. A Venn diagram consists of multiple overlapping closed curves, usually circles, each representing a set.

4. File:Venn and Euler diagrams of 3-ary Boolean relations.svg

   en.wikipedia.org/wiki/File:Venn_and_Euler...

   Relations from complementary becs are ordered symmetrically to the vertical middle axis of the image - except in rectangle 4: All relations with 4 white areas are from self complementary becs. Each one of the 256 possible relations can be expressed by one of these Euler diagrams by permuting and negating the arguments A, B, C.

5. File:Absolute complement.svg - Wikipedia

   en.wikipedia.org/wiki/File:Absolute_complement.svg

   You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...

6. Set (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Set_(mathematics)

   A set of polygons in an Euler diagram This set equals the one depicted above since both have the very same elements.. In mathematics, a set is a collection of different [1] things; [2] [3] [4] these things are called elements or members of the set and are typically mathematical objects of any kind: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other ...

7. Complement (set theory) - Wikipedia

   en.wikipedia.org/wiki/Complement_(set_theory)

   If A is a set, then the absolute complement of A (or simply the complement of A) is the set of elements not in A (within a larger set that is implicitly defined). In other words, let U be a set that contains all the elements under study; if there is no need to mention U, either because it has been previously specified, or it is obvious and unique, then the absolute complement of A is the ...

8. File:LogicGates.svg - Wikipedia

   en.wikipedia.org/wiki/File:LogicGates.svg

   File information Description Venn Diagrams Representing all Intersectional Logic Gates Between Two Inputs. Based on Image:LogicGates.jpg.. Source I (ZanderSchubert ()) created this work entirely by myself.

9. Naive set theory - Wikipedia

   en.wikipedia.org/wiki/Naive_set_theory

   The set B doesn't have to be a subset of A for A \ B to make sense; this is the difference between the relative complement and the absolute complement (A C = U \ A) from the previous section. To illustrate these ideas, let A be the set of left-handed people, and let B be the set of people with blond hair.