# Closed form

*This article defines a property that can be evaluated to true/false for a differential form (of any order)*

## Definition

A differential form of order on a differential manifold is termed a **closed form** if its de Rham derivative is zero.

*This article defines a property that can be evaluated to true/false for a differential form (of any order)*

**closed form** if its de Rham derivative is zero.

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