2025 : 3 : 14
Davood Alimohammadi

Davood Alimohammadi

Academic rank: Associate Professor
ORCID: https://orcid.org/0000-0002-9398-6213
Education: PhD.
ScopusId: 6505995626
HIndex:
Faculty: Science
Address: Arak University
Phone:

Research

Title
Order isomorphisms between real little Lipschitz algebras with Lipschitz involution
Type
JournalPaper
Keywords
Lipschitz involution · Little Lipschitz algebra · Order isomorphism · Order preserving map
Year
2024
Journal The Journal of Analysis
DOI
Researchers Esmat Ahmadloo ، Davood Alimohammadi

Abstract

Let $(X,d)$ and $(Y,\rho)$ be compact metric spaces‎, ‎$\tau$ and $\eta$ be Lipschitz involutions on $(X,d)$ and $(Y,\rho)$‎, ‎respectively‎, ‎and $\alpha,\beta\in(0,1)$‎. ‎We first give some sufficient conditions that a map $T$ between little real Lipschitz algebras with Lipschitz involution $\lip(X,d^\alpha,\tau)$ and $\lip(Y,\rho^\beta,\eta)$ be an order isomorphism‎. ‎We next prove that if $T:\lip(X,d^\alpha,\tau)\rightarrow \lip(Y,\rho^\beta,\eta)$ is an order isomorphism with $|T(i{\rm{Im}}\,f)|\leq T(|{\rm{Im}}\,f|)$ for all $f\in \lip(X,d^\alpha,\tau)$ and $|T^{-1}(i{\rm{Im}}\,h)|\leq T^{-1}(|{\rm{Im}}\,h|)$ for all $h\in \lip(Y,\rho^\beta,\eta)$‎, ‎then $T$ is a homeomorphism from $\lip(X,d^\alpha,\tau)$ with Lipschitz sum norm topology to $\lip(Y,\rho^\beta,\eta)$ with Lipschitz sum norm topology‎, ‎$T(1_X)$ and $T^{-1}(1_Y)$ are nonvanishing positive functions on $Y$ and $X$‎, ‎respectively‎, ‎and there exists a bijective map $\Phi:Y_\eta\rightarrow X_\tau$ such that $T(f)(y)=T(1_X)(y)f(x)$ for all $y\in Y$‎, ‎$x\in\Phi(y_\eta)$ and $f\in \lip(X,d^\alpha,\tau)$ with $f(x)\in\mathbb{R}$‎, ‎where $x_\tau=\{x,\tau(x)\}$ for all $x\in X$‎, ‎$X_\tau=\{x_\tau‎: ‎x\in X\}$‎, ‎$y_\eta=\{y,\eta(y)\}$ for all $y\in Y$ and $Y_\eta=\{y_\eta‎: y\in Y\}$‎. ‎Finally‎, ‎we prove that every order isomorphism between little real Lipschitz algebras $\lip_{\mathbb{R}}(X,d^\alpha)$ and $\lip_{\mathbb{R}}(Y,\rho^\beta)$ is an essential weighted composition operator.d