e/Modulus and characteristic of convexity

Information
has gloss	eng: In mathematics, the modulus and characteristic of convexity are measures of "how convex" the unit ball in a Banach space is. In some sense, the modulus of convexity has the same relationship to the ε-δ definition of uniform convexity as the modulus of continuity does to the ε-δ definition of continuity.
lexicalization	eng: Modulus and characteristic of convexity
instance of	e/Banach space