Busemann-coupling subdifferentials and Fenchel biconjugation on Hadamard manifolds

G. C. Bento, J. X. Cruz Neto, I. D. L. Melo

We introduce an intrinsic subdifferential on Hadamard manifolds induced by a base-point-dependent Busemann coupling, motivated by the scarcity of nonconstant affine functions on no…