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monotonically countably compact
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*Definition [#i4eb8448]
A topological space X is said to be monotonically countably compact if there is a function m on the set of countable open covers of X (which is called a monotone compactness operator) such that:
+if U is a countable open cover of X, then m(U) is a finite open cover of X which refines U;
+if U and V are coutable open covers of X with U refining V, then m(U) refines m(V).
*Remark [#hd10e394]
-See [[monotonically compact]].
*Reference [#vdf997a5]
-H. R. Bennett, K. P. Hart, and D. J. Lutzer, ''A note on monotonically metacompact spaces'', Topology and its Applications, 157(2010), 456-465.
-http://www.math.wm.edu/~lutzer/drafts/BigBushes.pdf (preprint)
終了行:
*Definition [#i4eb8448]
A topological space X is said to be monotonically countably compact if there is a function m on the set of countable open covers of X (which is called a monotone compactness operator) such that:
+if U is a countable open cover of X, then m(U) is a finite open cover of X which refines U;
+if U and V are coutable open covers of X with U refining V, then m(U) refines m(V).
*Remark [#hd10e394]
-See [[monotonically compact]].
*Reference [#vdf997a5]
-H. R. Bennett, K. P. Hart, and D. J. Lutzer, ''A note on monotonically metacompact spaces'', Topology and its Applications, 157(2010), 456-465.
-http://www.math.wm.edu/~lutzer/drafts/BigBushes.pdf (preprint)
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