Homeomorphic morphism and homotopy equivalence are two important concepts in the theory of algebraic topology.

同胚映射和同伦等价是代数拓扑学中的两个重要概念。

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Circle matrix is the algebraic description of all the resource circles in a directed graph, and equivalence reciprocally to that one of complementary set and T-characteristic vector.

回路矩阵是一个资源有向图全部资源回路的代数描述，并且它与补集及t -特征向量矩阵相互等价。

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This article is told the sense of equivalence between algebraic definition and projecting definition.

本文给出了关于二阶曲面的代数定义和射影定义之间的等价性定理。

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