Results 61 to 70 of about 438,929 (192)
Phytoextraction of Cr(VI) from soil using Portulaca oleracea [PDF]
, 2013 Cr(VI) represents an environmental challenge in both soil and water as it is soluble and bioavailable over a wide range of pH. In previous investigations, Portulaca oleracea (a plant local to the United Arab Emirates (UAE)) demonstrated particular ...
Alyazouri, Ayman H. +10 more
core +1 more source
Space time manifolds and contact structures
International Journal of Mathematics and Mathematical Sciences, 1990 A new class of contact manifolds (carring a global non-vanishing timelike vector field) is introduced to establish a relation between spacetime manifolds and contact structures.
K. L. Duggal
doaj +1 more source
The GJMS operators in geometry, analysis and physics
Journal of the London Mathematical Society, Volume 113, Issue 1, January 2026.Abstract The GJMS operators, introduced by Graham, Jenne, Mason and Sparling, are a family of conformally invariant linear differential operators with leading term a power of the Laplacian. These operators and their method of construction have had a major impact in geometry, analysis and physics.
Jeffrey S. Case, A. Rod Gover
wiley +1 more source
Global Holomorphic Approximations of CR Functions on CR Manifolds [PDF]
, 1985 Under some geometric and analytic conditions on a generic CR submanifold , it is proved that there exists a neighborhood Ω of with the following property: For any strongly pseudoconvex domain any smooth CR function can be uniformly approximated on by ...
Gauthier, P. M., Dwilewicz, Roman
core +1 more source
Hausdorff dimension of unions of k$k$‐planes
Mathematika, Volume 72, Issue 1, January 2026.Abstract We prove a conjecture of R. Oberlin and Héra on the dimension of unions of k$k$‐planes. Let 0
Shengwen Gan
wiley +1 more source
Geometry of CR-Submanifolds [PDF]
, 2009 To study the geometry of a manifold, it is more convenient to first embed into a known manifold and then study its geometry. This approach gave impetus to study of submanifold which later developed into an independent and fascinating topic of study.
Kaur, Manjot
core
Floer theory for the variation operator of an isolated singularity
Journal of Topology, Volume 18, Issue 4, December 2025.Abstract The variation operator in singularity theory maps relative homology cycles to compact cycles in the Milnor fiber using the monodromy. We construct its symplectic analog for an isolated singularity. We define the monodromy Lagrangian Floer cohomology, which provides categorifications of the standard theorems on the variation operator and the ...
Hanwool Bae +3 more
wiley +1 more source
The maximum modulus principle for CR functions [PDF]
, 1986 Let M M be a CR submanifold of C n {{\mathbf {C}}^n} without extreme points. Then, the modulus of any CR function on M M
Andrei Iordan
core +1 more source
A note on invariant submanifolds of CR-integrable almost Kenmotsu manifolds [PDF]
, 2017 The present paper deals with invariant submanifolds of CR-integrable almost Kenmotsu manifolds. Among others it is proved that every invariant submanifold of a CR-integrable (k,?)'-almost Kenmotsu manifold with k < -1 is totally geodesic ...
Young Suh, Uday De, Krishanu Mandal
core +1 more source
CR-hypersurfaces of complex projective space
International Journal of Mathematics and Mathematical Sciences, 1994 We consider compact n-dimensional minimal foliate CR-real submanifolds of a complex projective space. We show that these submanifolds are great circles on a 2-dimensional sphere provided that the square of the length of the second fundamental form is ...
M. A. Bashir
doaj +1 more source