Algebraic Topology
《Algebraic Topology》 · 第 101 页 · Chapter 5
A map \(i:A\to X\) is called a cofibration when extension along \(i\) depends only on the homotopy class of the map being extended.
Algebraic Topology
《Algebraic Topology》 · 第 101 页 · Chapter 5
A map \(i:A\to X\) is called a cofibration when extension along \(i\) depends only on the homotopy class of the map being extended.
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