The descending wedge symbol ∨ may represent: * Logical disjunction in propositional logic * Join in lattice theory * The wedge sum in topology The vertically reflected symbol, ∧, is a wedge, and often denotes related or

dual Dual or Duals may refer to: Paired/two things * Dual (mathematics), a notion of paired concepts that mirror one another ** Dual (category theory), a formalization of mathematical duality *** see more cases in :Duality theories * Dual (grammatical ...

operators. The ∨ symbol was introduced by

Russell Russell may refer to: People * Russell (given name) * Russell (surname) * Lady Russell (disambiguation) * Lord Russell (disambiguation) Places Australia *Russell, Australian Capital Territory *Russell Island, Queensland (disambiguation) **Ru ...

and Whitehead in '' Principia Mathematica'', where they called it the ''Logical Sum'' or ''Disjunctive Function''. In Unicode the symbol is encoded . In TeX, it is \vee or \lor. One motivation and the most probable explanation for the choice of the symbol ∨ is the latin word "vel" meaning "or" in the inclusive sense. Several authors use "vel" as name of the "or" function. Klaus Denecke, Shelly L. Wismath: Universal Algebra and Coalgebra, World Scientific, 2009, , p. 193; https://books.google.com/books?id=NgTAzhC8jVAC&pg=PA193#v=onepage&q&f=false

References

See also