βž°πŸ§‘βˆ—βˆ©βž°πŸŸ©

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

πŸ—ΊοΈβ†’

#algebraic topology #fundamental group calculation #covering space #homotopy theory #π₁ #space decomposition

πŸŸ¦πŸ€πŸŸ§β†’βž°

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

πŸ§©πŸ”—βˆ©πŸ§©β†’βž°

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