TeXipedia

dashleftarrow

Displays a dashed horizontal arrow pointing leftward, commonly used in mathematical notation and diagrams.

Overview

Serves as a specialized arrow variant for mathematical and technical documentation where a dashed left-pointing arrow is needed to indicate specific relationships or transformations.

  • Often used in commutative diagrams and mathematical proofs
  • Helpful for indicating reverse mappings or inverse relationships
  • Particularly useful in category theory and abstract algebra
  • Provides visual distinction from solid arrows when multiple arrow types are needed in the same context

Examples

Showing a dashed left arrow in a mapping notation.

f:ABf: A \dashleftarrow B
f: A \dashleftarrow B

Indicating a reverse process or reaction with a dashed arrow.

2H2O2H2+O22H_2O \dashleftarrow 2H_2 + O_2
2H_2O \dashleftarrow 2H_2 + O_2

Representing a backward implication with uncertainty.

P(x)Q(x)P(x) \dashleftarrow Q(x)
P(x) \dashleftarrow Q(x)