# Closed ideals in the uniform topology on the ring of real-valued continuous functions on a frame

### Mostafa Abedi

Esfarayen University of Technology, Iran### Ali Akbar Estaji

Hakim Sabzevari University, Sabzevar, Iran

## Abstract

For a completely regular frame $L$, the ring $RL$ of real-valued continuous functions on $L$ is equipped with the uniform topology. The closed ideals of $RL$ in this topology are studied, and a new, merely algebraic characterization of these ideals is given. This result is used to describe the real ideals of $RL$, and to characterize pseudocompact frames and Lindelöf frames. It is shown that a frame $L$ is finite if and only if every ideal of $RL$ is closed. Finally, we prove that every closed ideal in $RL$ is an intersection of maximal ideals.

## Cite this article

Mostafa Abedi, Ali Akbar Estaji, Closed ideals in the uniform topology on the ring of real-valued continuous functions on a frame. Rend. Sem. Mat. Univ. Padova 143 (2020), pp. 135–152

DOI 10.4171/RSMUP/43