形变收缩 Retract
(重定向自Absolute retract)
在拓扑学中,收缩(retraction),顾名思义是将整个空间收缩到一个子空间;形变收缩(deformation retraction)是将空间“连续收缩”成一个子空间的映射。
单词 | Absolute retract |
释义 |
Absolute retract
中文百科
形变收缩 Retract(重定向自Absolute retract)
在拓扑学中,收缩(retraction),顾名思义是将整个空间收缩到一个子空间;形变收缩(deformation retraction)是将空间“连续收缩”成一个子空间的映射。
英语百科
Retract 形变收缩(重定向自Absolute retract)
In topology, a branch of mathematics, a retraction is a continuous mapping from the entire space into a subspace which preserves the position of all points in that subspace. A deformation retraction is a map which captures the idea of continuously shrinking a space into a subspace. |
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