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Keywords:
weak base; $sn$-network; sequence-covering; $1$-sequence-covering; weak-open; $\pi$-$s$-map
weak base; $sn$-network; sequence-covering; $1$-sequence-covering; weak-open; $\pi$-$s$-map
Summary:
Some relationships between $1$-sequence-covering maps and weak-open maps or sequence-covering $s$-maps are discussed. These results are used to generalize a result from Lin S., Yan P., {\it Sequence-covering maps of metric spaces\/}, Topology Appl. {\bf 109} (2001), 301--314.
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