130 citations · 409 across the 79 of their papers we have counts for
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math.FA2004
On the Singularities of the Exponential Map in Infinite Dimensional Riemannian Manifolds
L. Biliotti, R. Exel, P. Piccione +1
Using symplectic techniques and spectral analysis of smooth paths of self-adjoint operators, we characterize the set of conjugate instants along a geodesic in an infinite dimension…
math.OA2004★ 2 cited
The Crossed Product by a Partial Endomorphism
R. Exel, D. Royer
Given a closed ideal I in a C*-algebra A, an ideal J (not necessarily closed) in I, a *-homomorphism \al:A --> M(I) and a map L:J --> A with some properties, based on [3] and [9] w…