Results 61 to 70 of about 716,407 (270)

Group Classification and Symmetry Reduction of a (1+1)-Dimensional Porous Medium Equation

AppliedMath
In this paper, we present Lie symmetry analysis of a generalized (1+1)-dimensional porous medium equation characterized by parameters m and d. Through group classification, we examine how these parameters influence the Lie symmetry structure of the ...
Polokwane Charles Makibelo, Winter Sinkala, Lazarus Rundora   +2 more
doaj   +1 more source

Mathematical Structure of Loop Quantum Cosmology: Homogeneous Models

Symmetry, Integrability and Geometry: Methods and Applications, 2013
The mathematical structure of homogeneous loop quantum cosmology is analyzed, starting with and taking into account the general classification of homogeneous connections not restricted to be Abelian.
Martin Bojowald
doaj   +1 more source

An adaptive prefix-assignment technique for symmetry reduction

, 2018
This paper presents a technique for symmetry reduction that adaptively assigns a prefix of variables in a system of constraints so that the generated prefix-assignments are pairwise nonisomorphic under the action of the symmetry group of the system.
A Itzhakov, A Kerber, A Kerber, BD McKay, BD McKay, BD McKay, G Audemard, G Chu, J Devriendt, J Håstad, JD Dixon, JD Laderman, JE Hopcroft, JF Humphreys, JS Leon, M Bläser, M Bläser, M Codish, M Hall Jr, MJH Heule, P Kaski, RC Read, S Winograd, V Strassen, VB Alekseev, VB Alekseev, VB Alekseyev, Á Seress   +27 more
core   +1 more source

Dualities, CPT Symmetry and Dimensional Reduction in String Theory [PDF]

, 1997
In this lecture we address the following issues in the context of string theories: i) The role played by S and T dualities in obtaining topological inflation in N=1 supergravity models, ii) A mechanism to generate the baryon asymmetry of the Universe ...
Affleck, Alvarez, Ambjorn, Banks, Banks, Banks, Bento, Bento, Bento, Bento, Bento, Bento, Bertolami, Bertolami, Bertolami, Bertolami, Bertolami, Bertolami, Binétruy, Brustein, Candelas, Carow-Watamura, Claudson, Cohen, Cohen, Coleman, Colladay, Colladay, Coughlan, de Carlos, De La Macorra, Dimopoulos, Dine, Dolgov, Ellis, Ferrara, Font, Font, Gasperini, Halliwell, Hartle, Ignatiev, Kostelecký, Kostelecký, Kostelecký, Kostelecký, Kuzmin, Kuzmin, Linde, O. Bertolami, Ross, Rubakov, Sakharov, Tseytlin, Veneziano, Vilenkin, Weinberg, Yamamoto, Yoshimura, Yoshimura, Yoshimura   +60 more
core   +3 more sources

Enzymatic degradation of biopolymers in amorphous and molten states: mechanisms and applications

FEBS Open Bio, EarlyView.
This review explains how polymer morphology and thermal state shape enzymatic degradation pathways, comparing amorphous and molten biopolymer structures. By integrating structure–reactivity principles with insights from thermodynamics and enzyme engineering, it highlights mechanisms that enable efficient polymer breakdown.
Anđela Pustak, Aleksandra Maršavelski
wiley   +1 more source

Unified Mathematical Framework for Slicing and Symmetry Reduction over Event Structures

Journal of Applied Mathematics, 2014
Nonclassical slicing and symmetry reduction can act as efficient structural abstract methods for pruning state space when dealing with verification problems.
Xinyan Gao, Yingcai Ding, Wenbo Liu, Kaidi Zheng, Siyu Huang, Ning Zhou, Dakui Li   +6 more
doaj   +1 more source

Dynamical Symmetry Breaking in Spaces with Constant Negative Curvature

, 1999
By using the Nambu-Jona-Lasinio model, we study dynamical symmetry breaking in spaces with constant negative curvature. We show that the physical reason for zero value of critical coupling value $g_c = 0$ in these spaces is connected with the effective ...
A.A. Bytsenko, B. Geyer, C.G. Callan, C.T. Hill, D.M. Gitman, E. Elizalde, E. Elizalde, E. V. Gorbar, E. Witten, G. Miele, I. Sachs, I.L. Buchbinder, I.S. Gradsteyn, I.V. Krive, J. Bardeen, J. Hubbard, J. Maldacena, J. Schwinger, K.G. Klimenko, M. Alford, M.F. Sohnius, N.D. Mermin, N.L. Balazs, P. Candelas, R. Camporesi, R. Camporesi, R. Rapp, R. Shankar, R.L. Stratonovich, S. Coleman, S. Kanemura, S.P. Klevansky, S.S. Gubser, T. Appelquist, T. Inagaki, T. Inagaki, T. Inagaki, T. Inagaki, T. Muta, V. A. Miransky, V.P. Gusynin, V.P. Gusynin, V.P. Gusynin, V.P. Gusynin, V.P. Gusynin, Y. Nambu   +45 more
core   +1 more source

Polarization‐resolved femtosecond Vis/IR spectroscopy tailored for resolving weak signals in biological samples using minimal sample volume

FEBS Open Bio, EarlyView.
Unique biological samples, such as site‐specific mutant proteins, are available only in limited quantities. Here, we present a polarization‐resolved transient infrared spectroscopy setup with referencing to improve signal‐to‐noise tailored towards tracing small signals. We provide an overview of characterizing the excitation conditions for polarization‐
Clark Zahn, Karsten Heyne
wiley   +1 more source

Floral symmetry affects bumblebee approach consistency in artificial flowers

Journal of Pollination Ecology, 2016
Bilateral symmetry has evolved from radial symmetry in several floral lineages, and multiple hypotheses have been proposed to account for the success of this floral plan.
Brett Matthew Culbert, Jessica Forrest
doaj   +1 more source

Lie symmetry and μ-symmetry methods for nonlinear generalized Camassa–Holm equation

Advances in Difference Equations, 2021
In this paper, a Lie symmetry method is used for the nonlinear generalized Camassa–Holm equation and as a result reduction of the order and computing the conservation laws are presented.
H. Jafari, K. Goodarzi, M. Khorshidi, V. Parvaneh, Z. Hammouch   +4 more
doaj   +1 more source