EntityQ4683190· pop 7· linked from 17 articlesadjunction spaceSign in to savea common construction in topology where one topological space is attached or "glued" onto anotherConnectionsmathematicsEntitytopologyEntitysphereEntitycontinuous functionEntitytopological spaceEntityequivalence relationEntitymanifoldEntityballEntityclosed setEntitycommutative diagramEntityPlanetMathEntitysubspace topologyEntityembeddingEntityJ. H. C. WhiteheadEntityCW complexEntityuniversal propertyEntityconnected sumEntityquotient topological spaceEntityinclusion mapEntitywedge sumEntityCategoriesTopological spacesTopology