Automorphism Groups of Classical Mechanical Systems.
Automorphism groups of parabolic geometries
Automorphisms of certain Stein mainfolds.
Automorphisms of Spacetime Manifold with Torsion
In this paper we prove that the maximum dimension of the Lie group of automorphisms of the Riemann–Cartan 4-dimensional manifold does not exceed 8, and if the Cartan connection is skew-symmetric or semisymmetric, the maximum dimension is equal to 7. In addition, in the case of the Riemann–Cartan -dimensional manifolds with semisymmetric connection the maximum dimension of the Lie group of automorphisms is equal to for any .
Automorphisms of submanifolds.
Automorphisms, Orbits, and Homogeneous Spaces of Non-Connected Lie Groups.
Autour de la conjecture de L. Markus sur les variétés affines.
Axial Isometries of Manifolds of Non-Positive Curvature.
Axiomatic quantum field theory in terms of operator product expansions: general framework, and perturbation theory via Hochschild cohomology.
Axioms for topological quantum field theories
B. Y. Chen's inequality for semi-slant submanifolds in -space forms.
Bäcklund transforms of conformal maps into the 4-sphere
Balanced metrics and noncommutative Kähler geometry.
Ball models in Hermitian spaces.
Ball versus distance convexity of metric spaces.
Ball-Homogeneous and Disk-Homogeneous Riemannian Manifolds.
Bar Billiards and Poncelet’s Porism
Barbilian's metrization procedure in the plane yields either Riemannian or Lagrange generalized metrics
In the present paper we answer two questions raised by Barbilian in 1960. First, we study how far can the hypothesis of Barbilian's metrization procedure can be relaxed. Then, we prove that Barbilian's metrization procedure in the plane generates either Riemannian metrics or Lagrance generalized metrics not reducible to Finslerian or Langrangian metrics.
Barta's Inequalities and the First Eigenvalue of a Cap Domain of a 2-Sphere.
Bas du spectre et delta-hyperbolicité en géométrie de Hilbert plane
On montre l’équivalence entre l’hyperbolicité au sens de Gromov de la géométrie de Hilbert d’un domaine convexe du plan et la non nullité du bas du spectre de ce domaine.