e/Calibrated geometry

Information
has gloss	eng: In the mathematical field of differential geometry, a calibrated geometry is a Riemannian manifold (M,g) of dimension n equipped with a differential p-form φ (for some 0 ≤ p ≤ n) which is a calibration in the sense that * φ is closed: dφ = 0, where d is the exterior derivative * for any x ∈ M and any oriented p-dimensional subspace ξ of TxM, φ\|ξ = λ volξ with λ ≤ 1. Here volξ is the volume form of ξ with respect to g.
lexicalization	eng: Calibrated geometry
instance of	c/Structures on manifolds