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单词 Quasicompact
释义

quasi-compact


A topological spaceMathworldPlanetmath is called quasi-compact if every open cover of it has a finite subcover. The distinction compact spaces and quasi-compact spaces exists because some people insist that a space that is compactPlanetmathPlanetmath must be a Hausdorff space. This distinction occurs for example in Robin Hartshorne’s book Algebraic GeometryMathworldPlanetmathPlanetmathPlanetmath.

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更新时间:2025/5/4 4:09:37