# Closed form

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Closed form may refer to:

## Mathematics

• Closed-form expression, a finitary expression
• Closed differential form, a differential form ${\displaystyle \alpha }$ whose exterior derivative ${\displaystyle d\alpha }$ is the zero form ${\displaystyle 0}$, meaning ${\displaystyle d\alpha =0}$.

## Poetry

• In poetry analysis, a type of poetry that exhibits regular structure, such as meter or a rhyming pattern
• Trobar clus, an allusive and obscure style adopted by some 12th-century troubadours