1 Introduction, by Louis Funar and Athanase Papadopoulos.- 2 Primes, Knots and Po, by Barry Mazur.- 3 A short history of open manifolds related to complex analytic coordinates, by Dennis Sullivan.- 4 Universal Spin Teichmüller Theory, I: The action of P(SL(2,Z)) on T ess+, by Robert C. Penner.- 5 Universal Spin Teichmüller Theory, II: Finite presentation of P(SL(2,Z)), by Robert C. Penner.- 6 Geometry of Fermat's sum of squares, by Greg McShane and Vlad Sergiescu.- 7 Ends and compactifications in geometric topology, by Ken'ichi Ohshika.- 8 Axiomatic phylogenetics, by Vladimir Turaev.- 9 About the diffeomorphisms of the 3-sphere and a famous theorem of Cerf (G4 = 0), by François Laudenbach.- 10 Holomorphic tensors on Vaisman manifolds, by Liviu Ornea and Misha Verbitsky.- 11 On the topology of monotone Lagrangians of high dimension, by Mihai Damian.- 12 Kervaire Problems in Stable Homotopy Theory, by Petr M. Akhmet'ev.- 13 Lifting generic maps to embeddings, The double point obstruction, by Sergey A. Melikhov.- 14 "Barcodes" for continuous maps and a brief introduction to Alternative Morse Theory, by Dan Burghelea.- 15 A note on the quasi simple filtration of finite groups, by Francesco Russo.- 16 Lifting maps between graphs to embeddings, by Alexey Gorelov.- 17 A note on the discriminant loci of a hypersurface of bi-degree (m, n), by Susumu Tanabé.- 18 Welded graphs, Wirtinger groups and punctured spheres, by Benjamin Audoux, Jean-Baptiste Meilhan and Akira Yasuhara.- 19 On geometric representation of L-homology classes, by Friedrich Hegenbarth and Dusan D. Repovs.- 20 On elementary invariants of genus one knots and Seifert surfaces, by Christine Lescop.- 21 On a family of hyperbolic Brunnian links and their volumes, by Dusan D. Repovs and Andrei Yu. Vesnin.- 22 SL(2, Z), les tresses à trois brins, le tore modulaire et Aut+(F2), (d'après Emil Artin et Jacob Nielsen), by Alexis Marin.- 23 "All the resources of pure mathematics": Mathematical physics and mathematics as physics, by Arkady Plotnitsky.- 24 The case for absolute geometry, by Victor Pambuccian.- 25 The Reconstruction of Theaetetus' Theory of Ratios of Magnitudes, by Stelios Negrepontis and Dimitrios Protopapas.- 26 Notice de travaux, by Valentin Poénaru.- 27 Mathematical Adventures: A letter to Barry Mazur, by Valentin Poénaru.- 28 Adventures in physics, by Valentin Poénaru.- 29 Dimitru Poénaru, my father, by Valentin Poénaru.- 30 Father Andrei, by Valentin Poénaru.- 31 The magic summer of 1964, by Valentin Poénaru.- 32 Po, a mathematician between humanism and science, Corrado Tanasi and Franco Marchese.
