Geodesic
Preservation and reflection of properties acc and hacc
Commentationes Mathematicae Universitatis Carolinae, Tome 37 (1996) no. 1, pp. 147-153

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The aim of the paper is to study the preservation and the reflection of acc and hacc spaces under various kinds of mappings. In particular, we show that acc and hacc are not preserved by perfect mappings and that acc is not reflected by closed (nor perfect) mappings while hacc is reflected by perfect mappings.
Classification : 54D20, 54D30
Keywords: acc space; hacc space; countably compact space; ordinal space; cofinality 
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     title = {Preservation and reflection of properties acc and hacc},
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Bonanzinga, M. Preservation and reflection of properties acc and hacc. Commentationes Mathematicae Universitatis Carolinae, Tome 37 (1996) no. 1, pp. 147-153. http://geodesic.mathdoc.fr/item/CMUC_1996__37_1_a8/