Results 41 to 50 of about 23,363,338 (328)

The Dual and Mirror Images of the Dunwoody 3-Manifolds

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2013
Recently, in 2013, we proved that certain presentations present the Dunwoody 3-manifold groups. Since the Dunwoody 3-manifolds do not have a unique Heegaard diagram, we cannot determine a unique group presentation for the Dunwoody 3-manifolds. It is well
Soo Hwan Kim, Yangkok Kim
doaj   +1 more source

On L to H-mode transitions of the tokamak and entropy reduction [PDF]

open access: yesNuclear Technology and Radiation Protection, 2006
In an ideal case, it is assumed that the models for tokamak and stellarator plasma behaviour lead to the theory of invariant manifolds by Rastović [Chaos, Solitons & Fractals, 2007]. But, at the present state of knowledge a more realistic concept for
Rastović Danilo
doaj   +1 more source

Mirror symmetry for five-parameter Hulek-Verrill manifolds

open access: yesSciPost Physics, 2023
We study the mirrors of five-parameter Calabi-Yau threefolds first studied by Hulek and Verrill in the context of observed modular behaviour of the zeta functions for Calabi-Yau manifolds. Toric geometry allows for a simple explicit construction of these
Philip Candelas, Xenia de la Ossa, Pyry Kuusela, Joseph McGovern
doaj   +1 more source

Dehn surgeries and negative-definite four-manifolds [PDF]

open access: yes, 2012
Given a knot <i>K</i> in the three-sphere, we address the question: Which Dehn surgeries on <i>K</i> bound negative-definite four-manifolds?
Strle, Sašo, Owens, Brendan
core   +1 more source

H-conformal anti-invariant submersions from almost quaternionic Hermitian manifolds [PDF]

open access: yes, 2020
summary:We introduce the notions of h-conformal anti-invariant submersions and h-conformal Lagrangian submersions from almost quaternionic Hermitian manifolds onto Riemannian manifolds as a generalization of Riemannian submersions, horizontally conformal
Park, Kwang Soon
core   +1 more source

Entrainment Dynamics Organised by Global Manifolds in a Circadian Pacemaker Model

open access: yesFrontiers in Applied Mathematics and Statistics, 2021
Circadian rhythms are established by the entrainment of our intrinsic body clock to periodic forcing signals provided by the external environment, primarily variation in light intensity across the day/night cycle.
Jennifer L. Creaser   +4 more
doaj   +1 more source

Geometrical Theory on Combinatorial Manifolds [PDF]

open access: yes, 2005
Topological and differential structures such as those of d-pathwise connected, homotopy classes, fundamental d-groups in topology and tangent vector fields, tensor fields, connections, Minkowski norms in differential geometry on these finitely ...
Mao, Linfan
core   +1 more source

F-biharmonic maps into general Riemannian manifolds

open access: yesOpen Mathematics, 2019
Let ψ:(M, g) → (N, h) be a map between Riemannian manifolds (M, g) and (N, h).
Mi Rong
doaj   +1 more source

Group Geometrical Axioms for Magic States of Quantum Computing

open access: yesMathematics, 2019
Let H be a nontrivial subgroup of index d of a free group G and N be the normal closure of H in G. The coset organization in a subgroup H of G provides a group P of permutation gates whose common eigenstates are either stabilizer states of the Pauli ...
Michel Planat   +3 more
doaj   +1 more source

A note on generalization of Zermelo navigation problem on Riemannian manifolds with strong perturbation

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017
We generalize the Zermelo navigation on Riemannian manifolds (M; h), admitting a space dependence of a ship's speed 0 < |u(x)|h ≤ 1 in the presence of a perturbation W̃ determined by a strong (critical) velocity vector field satisfying |W̃ (x)|h = |u(x ...
Kopacz Piotr
doaj   +1 more source

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