\xrightharpoondown{abc}The command \xrightharpoondown{abc} is used in LaTeX to create an extensible right harpoon arrow over the text 'abc'. This is typically used in mathematical notation to denote a vector or a function that is being applied in a specific direction. The arrow can be extended to accommodate longer text or expressions, making it versatile for various mathematical contexts.
Denotes a vector v with a right harpoon arrow above it.
\xrightharpoondown{v}Indicates a function f(x) with a directional arrow, often used in vector calculus.
\xrightharpoondown{f(x)}Represents a directed line segment or vector from point A to point B.
\xrightharpoondown{AB}