On homomorphisms of bicyclic extensions of archimedean totally ordered groups

Abstract

Let $\mathscr{B}^+(G)$ be the bicyclic extension of a totally ordered group $G$ which is defined in [O. Gutik, D. Pagon, and K. Pavlyk, Congruences on bicyclic extensions of a linearly ordered group, Acta Comment. Univ. Tartu. Math. 15 (2011), no. 2, 61-80, (arXiv:1111.2401)]. We show that if $G$ and $H$ are archimedean totally ordered groups then every $o$-homomorphism $\widehat{\varphi}\colon G\to H$ generates a monoid homomorphim $\widetilde{\varphi}\colon \mathscr{B}^+(G)\to \mathscr{B}^+(H)$, and every monoid homomorphism $\widetilde{\varphi}\colon \mathscr{B}^+(G)\to \mathscr{B}^+(H)$ generates $o$-homomorphism $\widehat{\varphi}\colon G\to H$.