A note on covers defining relative and sectional categories
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DOI: 10.1016/j.topol.2019.07.004
Abstract: Abstract 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… read more here.
Keywords: category; note covers; relative sectional; sectional categories ... See more keywords