Results 91 to 100 of about 3,164,214 (296)

Ancient solutions of the homogenous Ricci flow on flag manifolds

open access: yesExtracta Mathematicae, 2021
For any flag manifold M=G/K of a compact simple Lie group G we describe non-collapsing ancient invariant solutions of the homogeneous unnormalized Ricci flow.
S. Anastassiou, I. Chrysikos
doaj  

Invariant solutions of Barlett and Whitaker’s equations

open access: yes, 2019
Lie symmetry group method is applied to study the Barlett and Whitaker’s equations. The symmetry group and its optimal system are given,and group invariant solutions associated to the symmetries are obtained.
Mehdi Nadjafikhah (6812084)   +1 more
core   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Scale-Invariant Rotating Black Holes in Quadratic Gravity

open access: yesEntropy, 2015
Black hole solutions in pure quadratic theories of gravity are interesting since they allow the formulation of a set of scale-invariant thermodynamics laws.
Guido Cognola   +2 more
doaj   +1 more source

INVARIANT AND PARTIAL-INVARIANT SOLUTIONS OF BOUNDARY PROBLEMS FOR DIFFERENTIAL EQUATIONS WITN SYMMETRIES

open access: yes, 1996
The aim of the work is to investigate the problems of existing invariant and partial-invariant solutions. It has been proved that all the partial-invariant solutions with invariance defect 1 are reduced to the invariant ones.
Ignatovich, Nikolay Victorovich
core  

Zero-coupon bond prices in the Vasicek and CIR models: Their computation as group-invariant solutions

open access: yes, 2008
We compute prices of zero-coupon bonds in the Vasicek and Cox?Ingersoll?Ross interest rate models as group-invariant solutions. Firstly, we determine the symmetries of the valuation partial differential equation that are compatible with the terminal ...
Sinkala, W, Leach, PGL, O'Hara, JG
core   +1 more source

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

On New Invariant Solutions of Generalized Fokker Planck Equation *

open access: yes, 2020
The generalized one-dimensional Fokker-Planck equation is analyzed via potential symmetry method and the invariant solutions under potential symmetries are obtained.
L I Zhi-Bin, Yao Ruo-Xia
core  

Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers

open access: yesFEBS Letters, EarlyView.
Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui   +4 more
wiley   +1 more source

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

open access: yesAppliedMath
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   +2 more
doaj   +1 more source

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