Löser

Löser is a German noun meaning "one who solves" or "solver." It is formed from the verb lösen with the agent-noun suffix -er. While not a common everyday term, it is widely used in technical and academic writing to denote a tool, person, or method that provides a solution to a problem.

In mathematics and computer science, a Löser refers to a solver—the algorithm, subroutine, or software component that computes solutions. It can describe solvers for equations, systems of equations, optimization problems, or constraint satisfaction problems. In practice, the term emphasizes the outcome (a valid solution) rather than the specific solving process. Often, problem areas are paired with the word "Löser" to name a concrete implementation, such as an equation solver or a linear programming solver.

As a surname, Löser occurs in German-speaking regions and may appear in historical records or contemporary documents. Spelling variations exist, reflecting regional orthography.

See also: Lösung (solution), Lösungsweg (solution path), Solver (loanword in technical contexts).