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2. Venn diagram - Wikipedia

   en.wikipedia.org/wiki/Venn_diagram

   A Venn diagram is a widely used diagram style that shows the logical relation between sets, popularized by John Venn (1834–1923) in the 1880s. The diagrams are used to teach elementary set theory, and to illustrate simple set relationships in probability, logic, statistics, linguistics and computer science.

3. Onion model - Wikipedia

   en.wikipedia.org/wiki/Onion_model

   An onion model used in social penetration theory. The onion model is a graph-based diagram and conceptual model for describing relationships among levels of a hierarchy, evoking a metaphor of the layered "shells" exposed when an onion (or other concentric assembly of spheroidal objects) is bisected by a plane that intersects the center or the innermost shell.

4. Heteronym (linguistics) - Wikipedia

   en.wikipedia.org/wiki/Heteronym_(linguistics)

   A heteronym (also known as a heterophone) is a word that has a different pronunciation and meaning from another word but the same spelling. These are homographs that are not homophones. Thus, lead (/ˈlɛd/ the metal) and lead (/ˈliːd/ a leash) are heteronyms, but mean (/ˈmin/ average) and mean (/ˈmin/ intend) are not, since they are ...

5. Mathematical diagram - Wikipedia

   en.wikipedia.org/wiki/Mathematical_diagram

   A Young diagram or Young tableau, also called Ferrers diagram, is a finite collection of boxes, or cells, arranged in left-justified rows, with the row sizes weakly decreasing (each row has the same or shorter length than its predecessor). Young diagram. Listing the number of boxes in each row gives a partition of a positive integer n, the ...

6. 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 ...

7. Information diagram - Wikipedia

   en.wikipedia.org/wiki/Information_diagram

   An information diagram is a type of Venn diagram used in information theory to illustrate relationships among Shannon's basic measures of information: entropy, joint entropy, conditional entropy and mutual information. [1][2] Information diagrams are a useful pedagogical tool for teaching and learning about these basic measures of information.