Curvature of Riemannian manifolds, a Common card

The card carries these facts from its Wikipedia article.

• Riemann introduced an abstract and rigorous way to define curvature for these manifolds, now known as the Riemann curvature tensor.
• Similar notions have found applications everywhere in differential geometry of surfaces and other objects.
• The curvature of a pseudo-Riemannian manifold can be expressed in the same way with only slight modifications.

Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The Curvature of Riemannian manifolds article was read about 13,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 58 and blocks with 26: each hit it takes is cut by 10 %.

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The cards just above and just below Curvature of Riemannian manifolds in the power ranking, all domains together.