Conjugate radius

This article defines a scalar function on a manifold, viz a function from the manifold to real numbers. The scalar function may be intrinsic or defined in terms of some other structure/functions

Definition

The conjugate radius is a scalar function on a Riemannian manifold $M$ is defined as follows: the injectivity radius at $x \in M$ is the supremum of all values $r$ such that the exponential map from the unit ball $B_r(x)$ in $T_xM$, to the manifold $M$, is nonsingular.

Related notions

• Injectivity radius