βž°πŸ§‘βˆ—βˆ©βž°πŸŸ©

#fundamental group #amalgamated free product #pushout #group theory #algebraic topology #van kampen theorem #π₁

πŸ₯¨β†’{G}

#algebraic topology #algebraic invariants #classification of surfaces #fundamental group #homology group #topology #abstract algebra #group theory

β˜•βž‘οΈπŸ©Ο€β‚

#algebraic topology #fundamental group #torus #homotopy #homeomorphism #invariants #topology #abstract algebra

πŸ—ΊοΈπŸ”—

#topology #connectedness #path connectedness #mathematics #space properties #fundamental group

βž°γ€°οΈΟ€β‚

#algebraic topology #homotopy #fundamental group #loop space #deformation retract #topology #abstract algebra

πŸŸ¦πŸ€πŸŸ§β†’βž°

#fundamental group #algebraic topology #gluing spaces #path connected #π₁ #homotopy theory

UβˆͺV|U∩Vβž‘οΈΟ€β‚

#seifert van kampen #fundamental group #algebraic topology #topology notation #computing π₁ #theorem

πŸ§©πŸ”—βˆ©πŸ§©β†’βž°

#fundamental group #composition law #combining spaces #gluing lemma #algebraic topology #π₁

πŸ“βž°βž‘οΈβ€’

#fundamental group #base point #nullhomotopic #contractible #topology #algebraic topology #pi_1