Abstract
Let X be a Tychonoff space and Ck(X) be the vector topological space of continuous real-valued functions on X with the compact open topology. The problem of characterizing Ck(X) in terms of X has interested several authors; in particular, Gruenhage and Ma for the baireness property and recently Sakai with the κ-Fréchet Urysohn property. Motivated by their works, we are interested in the o-Malykhin property for Ck(X). In this note, we will show that Ck(X) is o-Malykhin if and only if every moving off collection of non-empty compacts of X contains an infinite compact-finite collection. We will also characterize the o-Malykhin property for Ck(X) by a topological game defined on X, and we will give some related results.
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