---- > [!definition] Definition. ([[topological pair]]) > A **topological pair** is a pair of [[topological space|topological spaces]] $(X,A)$ where $A$ is a [[subspace topology|subspace]]. A **map of pairs** $(X,A) \to (Y,B)$ is a [[continuous]] map $X \to Y$ which restricts to a map $A \to B$. ^definition ---- #### ---- #### References > [!backlink] > ```dataview > TABLE rows.file.link as "Further Reading" > FROM [[]] > FLATTEN file.tags as Tag > WHERE Tag = "#definition" OR Tag = "#theorem" OR Tag = "#MOC" OR Tag = "#proposition" OR Tag = "#axiom" > GROUP BY Tag > ``` > [!frontlink] > ```dataview > TABLE rows.file.link as "Further Reading" > FROM outgoing([[]]) > FLATTEN file.tags as Tag > WHERE Tag = "#definition" OR Tag = "#theorem" OR Tag = "#MOC" OR Tag = "#proposition" OR Tag = "#axiom" > GROUP BY Tag > ```