Topics in Algebraic deformation theory.- Origins and breadth of the theory of higher homotopies.- The deformation philosophy, quantization and noncommutative space-time structures.- Differential geometry of Gerbes and differential forms.- Symplectic connections of Ricci type and star products.- Effective Batalin-Vilkovisky theories, equivariant configuration spaces and cyclic chains.- Noncommutative calculus and the Gauss-Manin connection.- The Lie algebra perturbation lemma.- Twisting Elements in Homotopy G-algebras.- Homological perturbation theory and homological mirror symmetry.- Categorification of acyclic cluster algebras: an introduction.- Poisson and symplectic functions in Lie algebroid theory.- The diagonal of the Stasheff polytope.- Permutahedra, HKR isomorphism and polydifferential Gerstenhaber-Schack complex.- Applications de la bi-quantification a la théorie de Lie.- Higher homotopy Hopf algebras found: A ten year retrospective
