Results 1 to 10 of about 1,073,400 (288)

Targeting high symmetry in structure predictions by biasing the potential energy surface

open access: yesPhysical Review Research, 2023
Ground-state structures found in nature are, in many cases, of high symmetry. But structure prediction methods typically render only a small fraction of high-symmetry structures.
Hannes Huber   +3 more
doaj   +1 more source

Symmetry of benzenoid chains

open access: yesMacedonian Journal of Chemistry and Chemical Engineering, 2006
Graph theory provides an elegant and natural representation of molecular symmetry and the resulting group expressed in terms of permutations is isomorphic to the permutation-inversion group of Longuet-Higgins.
Ahmad Gholami   +2 more
doaj  

Dihedral Group in The Ancient Genetic

open access: yesJurnal Matematika Integratif, 2020
The standard genetic code consist of four nucleotide bases which encode genes to produce amino acids needed by living things. The addition of new base  (Dummy) causes a sequence of bases to become five nucleotide bases called ancient genetic codes.
Isah Aisah, Eddy Djauhari, Asep Singgih
doaj   +1 more source

Pairing symmetry and fermion projective symmetry groups

open access: yesSciPost Physics
The Ginzburg-Landau (GL) theory is very successful in describing the pairing symmetry, a fundamental characterization of the broken symmetries in a paired superfluid or superconductor. However, GL theory does not describe fermionic excitations such as Bogoliubov quasiparticles or Andreev bound states that are directly related to topological properties ...
Xu Yang   +4 more
openaire   +3 more sources

An optimal system of one-dimensional subalgebras for the symmetry algebra of three-dimensional equations of the perfect plasticity

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2011
The present paper is devoted to a study of a natural 12-dimensional symmetry algebra of the three-dimensional hyperbolic differential equations of the perfect plasticity, obtained by D. D. Ivlev in 1959 and formulated in isostatic coordinates. An optimal
Vladimir A Kovalev, Yuriy N Radaev
doaj  

Magnetic Symmetry Point Groups

open access: yes, 2018
In this chapter we consider the magnetic symmetry point groups, which are obtained by extending the classical point symmetry groups using the time-reversal operator \(\mathbf {T}\). In this case, the operator \(\mathbf {T}\) is not an element of the extended symmetry group, but it is contained in the group as a product of elements of the original point
openaire   +2 more sources

Symmetry group analysis and invariant solutions of hydrodynamic-type systems

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2004
We study point and higher symmetries of systems of the hydrodynamic type with and without an explicit dependence on t,x. We consider such systems which satisfy the existence conditions for an infinite-dimensional group of hydrodynamic symmetries which ...
M. B. Sheftel
doaj   +1 more source

Finite Group Symmetry Breaking

open access: yes, 2006
Finite group symmetry is commonplace in Physics, in particular through crystallographic groups occurring in condensed matter physics -- but also through the inversions (C,P,T and their combinations) occurring in high energy physics and field theory. The breaking of finite groups symmetry has thus been thoroughly studied, and general approaches exist to
openaire   +2 more sources

The Language of Spheres in Physics

open access: yesUniverse
Physical laws manifest themselves through the amalgamation of mathematical symbols, numbers, functions, geometries, and relationships. These intricate combinations unfold within a mathematical model devised to capture and represent the “objective reality”
Jean-Pierre Gazeau
doaj   +1 more source

Extended topological group structure due to average reflection symmetry

open access: yesNew Journal of Physics, 2015
We extend the single-particle topological classification of insulators and superconductors to include systems in which disorder preserves average reflection symmetry.
M Diez   +3 more
doaj   +1 more source

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