Topic: Quotient Topology and Identification Spaces

Quotient Topologies from Group Orbits

Projective Space as the Space of Lines

Products of Open Quotient Maps

Open Surjections as Quotient Maps

Open Sets in a Quotient

Finite Quotient Spaces by Equivalence-Class Tables

Fibers and Saturated Sets

Equivalence Relations as Identification Rules

Endpoint Identification Produces the Circle

Composing Quotient Maps