Several algebraic and topological properties of subgradient projection
operators are investigated and various examples are provided. Connections with
Moreau's proximity operator are also made and acceleration schemes for
subgradient projection algorihms are discussed. Finally continuity,
nonexpansiveness, monotonicity, differentiability, and epi-convergence
properties are investigated.Comment: Master Thesis Memoir under the supervision of Patrick L. Combettes,
  in Frenc