Darr
Represents a double downward-pointing arrow, commonly used to indicate strong downward relationships or decreasing trends in mathematical expressions.
Overview
Serves as a distinctive arrow variant in mathematical notation, particularly useful when emphasizing vertical relationships or hierarchical structures.
- Often employed in commutative diagrams and mathematical proofs
- Used to show significant decreases or downward mappings in formal notation
- Appears in set theory and abstract algebra to denote specific downward relations
- Provides a more emphatic alternative to single downward arrows when stronger visual emphasis is needed
Examples
Showing a significant decrease in a statistical trend
\text{Temperature} \Darr \text{ by } 15°\text{C}Indicating downward movement in mathematical sequences
a_n \Darr 0 \text{ as } n \to \inftyRepresenting a downward mapping between sets
f: A \Darr B