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arxiv: 1905.07199 · v1 · pith:NG7JNEC2new · submitted 2019-05-17 · 🧮 math.AT

A note on covers defining relative and sectional categories

classification 🧮 math.AT
keywords categorycoversrelativeopensectionalarbitrarycategoriescharacterization
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We give a characterization of relative category in the sense of Doeraene-El Haouari by using open covers. We also prove that relative category and sectional category can be defined by taking arbitrary covers (not necessarily open) when dealing with ANR spaces.

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