e/Ricci-flat manifold

Information
has gloss	eng: In mathematics, Ricci-flat manifolds are Riemannian manifolds whose Ricci curvature vanishes. In physics, they represent vacuum solutions to the analogues of Einstein's equations for Riemannian manifolds of any dimension, with vanishing cosmological constant. Ricci-flat manifolds are special cases of Einstein manifolds, where the cosmological constant need not vanish.
lexicalization	eng: Ricci-flat manifold
instance of	(noun) a set of points such as those of a closed surface or an analogue in three or more dimensions manifold

Meaning
Chinese
has gloss	zho: 數學中，里奇平坦流形（Ricci-flat manifold）是里奇張量為零的黎曼流形。在物理學中，它們代表了愛因斯坦方程在任何維數之黎曼流形且宇宙常數為零的類比，其所具有的真空解。里奇平坦流形是愛因斯坦流形的特殊情形，後者的宇宙常數並不需要為零。
lexicalization	zho: 里奇平坦流形