\updownarrowThe \updownarrow symbol is used to represent a bidirectional arrow, indicating a relationship or connection that goes both ways. It is often used in mathematical logic, set theory, and computer science to denote equivalence or duality between two entities.
Indicates a bidirectional relationship between A and B
A \updownarrow BRepresents a duality or equivalence between x and y
x \updownarrow yUsed in logic to show that P and Q are equivalent or interchangeable
P \updownarrow Q