lHS

LHS is an acronym that can refer to several different terms and entities, depending on context. The most frequent use in mathematics and related fields is to denote the left-hand side of an equation or identity, contrasted with the right-hand side (RHS).

In mathematics, the LHS of an equation is the expression that appears to the left of the equals sign. It is used in solving equations, transforming expressions, and presenting proofs. For example, in the equation 3x + 5 = 2x + 9, the LHS is 3x + 5 and the RHS is 2x + 9. The concept helps organize algebraic manipulation and verify equalities.

Beyond mathematics, LHS is a common initialism for various organizations, institutions, and phrases. A frequent usage is as the abbreviation for high schools whose names begin with L, H, and S (for example, Lakeview High School or Lincoln High School). The exact institution or meaning depends on regional usage and the full name being shortened.

In computing and logic contexts, LHS can denote the left-hand side of a formal rule or expression, such as the left-hand side of a production rule in grammars or rewrite systems. Here it is often paired with RHS, the right-hand side, to describe transformations or derivations.

Because LHS can stand for many different things, its precise meaning is usually clear from surrounding text or domain-specific conventions. When encountering the acronym, context helps determine whether it refers to a mathematical left-hand side, a particular organization, or another field-specific usage. See also RHS and related terminology.