Results 31 to 40 of about 932,040 (258)

Dynamics of a Modified Sprott A System [PDF]

open access: yesITM Web of Conferences
We examine a modified Sprott A system, one of the 17 chaotic systems without equilibria introduced by Jafari, Sprott, and Golpayegani (2013). For specific parameter values, the modified system exhibits invariant spheres.
Rohman Muhammad Nuur   +2 more
doaj   +1 more source

Nicolai maps with four-fermion interactions

open access: yesJournal of High Energy Physics, 2023
Nicolai maps offer an alternative description of supersymmetric theories via nonlinear and nonlocal transformations characterized by the so-called ‘free-action’ and ‘determinant-matching’ conditions.
Lorenzo Casarin   +2 more
doaj   +1 more source

Geometry of Convex Geometries

open access: yesDiscrete & Computational Geometry
21 pages, 2 ...
Chalopin, Jérémie   +2 more
openaire   +3 more sources

DARK GEOMETRY

open access: yesInternational Journal of Modern Physics D, 2004
Extra-dimensional theories contain additional degrees of freedom related to the geometry of the extra space which can be interpreted as new particles. Such theories allow to reformulate most of the fundamental problems of physics from a completely different point of view.
Cembranos, J. A. R.   +2 more
openaire   +3 more sources

The Geometry of Negation

open access: yesJournal of Applied Non-Classical Logics, 2003
There are two natural ways of thinking about negation: (i) as a form of complementation and (ii) as an operation of reversal, or inversion (to deny that p is to say that things are “the other way around”). A variety of techniques exist to model conception (i), from Euler and Venn diagrams to Boolean algebras.
Achille C. Varzi, Massimo Warglien
openaire   +4 more sources

Zariski geometries [PDF]

open access: yesBulletin of the American Mathematical Society, 1993
We characterize the Zariski topologies over an algebraically closed field in terms of general dimension-theoretic properties. Some applications are given to complex manifold and to strongly minimal sets.
Hrushovski, E, Zilber, B
openaire   +6 more sources

Geodesics on Calabi-Yau manifolds and winding states in nonlinear sigma models

open access: yesFrontiers in Physics, 2013
We conjecture that a non-flat D-real-dimensional compact Calabi-Yau manifold, such as a quintic hypersurface with D=6, or a K3 manifold with D=4, has locally length minimizing closed geodesics, and that the number of these with length less than L grows ...
Peng eGao, Michael R. Douglas
doaj   +1 more source

Boundedness of a Kantorovich type of the Szász-Mirakjan Operator [PDF]

open access: yesITM Web of Conferences
Let Bn f represent the n-th Bernstein polynomial for f for each n ϵ ℕ and f ϵ C ([0, 1]) . Then for any f ϵ C ([0, 1]), the sequence {Bn f} converges uniformly to f.
Neswan Oki   +3 more
doaj   +1 more source

On geometry of numbers. [PDF]

open access: yesJournal of the Mathematical Society of Japan, 1955
In a recent paper Tsuji [1952] has given some theorems which may be considered as a generalization to Fuchsian groups of the classical theorems of Blichfeldt [1914] and Minkowski in the geometry of numbers. In both cases, however, the generalization is restricted to circular domains.
openaire   +4 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

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