Let $\mathcal{R}_c( L)$ be the pointfree version of $C_c(X)$, the subring of $C(X)$ whose elements have countable image. We shall call a frame $L $ a $CP$-frame if the ring $\mathcal{R}_c( L)$ is regular. % The main aim of this paper is to introduce $CP$-frames, that is $\mathcal{R}_c( L)$ is a regular ring. We give some We give some characterizations of $CP$-frames and we show that $L$ is a $CP$-frame if and only if each prime ideal of $\mathcal{R}_c ( L)$ is an intersection of maximal ideals if and only if every ideal of $\mathcal{R}_c ( L)$ is a $z_c$-ideal. In particular, we prove that any $P$-frame is a $CP$-frame but not conversely, in general. In addition, we study some results about $CP$-frames like the relation between a $CP$-frame $L$ and ideals of closed quotients of $L$. Next, we characterize $CP$-frames as precisely those $L$ for which every prime ideal in the ring $\mathcal{R}_c ( L)$ is a $z_c$-ideal. Finally, we show that this characterization still holds if prime ideals are replaced by essential ideals, radical ideals, convex ideals, or absolutely convex ideals.
Estaji, A. A., & Robat Sarpoushi, M. (2021). On CP-frames. Journal of Algebra and Related Topics, 9(1), 109-119. doi: 10.22124/jart.2021.18801.1252
MLA
A. A. Estaji; M. Robat Sarpoushi. "On CP-frames". Journal of Algebra and Related Topics, 9, 1, 2021, 109-119. doi: 10.22124/jart.2021.18801.1252
HARVARD
Estaji, A. A., Robat Sarpoushi, M. (2021). 'On CP-frames', Journal of Algebra and Related Topics, 9(1), pp. 109-119. doi: 10.22124/jart.2021.18801.1252
VANCOUVER
Estaji, A. A., Robat Sarpoushi, M. On CP-frames. Journal of Algebra and Related Topics, 2021; 9(1): 109-119. doi: 10.22124/jart.2021.18801.1252
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