Involutiv

Involutiv is a term encountered in a few scholarly writings to describe phenomena that involve self-inversion, reversal, or turning back upon themselves. It is not widely standardized in English; the more common form is involutive. The adjective is derived from the Latin involutus, meaning rolled in or wrapped, sharing its root with the mathematical concept of an involution.

In mathematics and logic, an involutive (often called involutive in English) operation is one that is its own inverse: applying the operation twice yields the original input. Examples include logical negation or bitwise complement on fixed-width data. When the term involutiv is used, writers typically intend this self-inverse property or its generalization, rather than a specific formal definition.

In linguistics and philosophy, involutiv can appear in discussions of processes that seem to revert or echo earlier states, though such usage is not standard. When employed, it generally signals a reversal or returning to an initial condition rather than a forward progression.

See also involution, involutive, symmetry, inversion. The term's usage varies by discipline, and readers should consult the source for how the author defines involutiv in context.