Similar to 剣持点

Apollonius point

Twin circles

Yff center of congruence

Schiffler point

Spieker circle

Circumgon

Encyclopedia of Triangle Centers

Circumcircle

Incircle and excircles

Orthocentroidal circle

Malfatti circles

Taylor circle

Annales de Gergonne

P-adic Teichmüller theory

P-adic distribution

RSA cryptosystem

Vieta jumping

Witch of Agnesi

Abelian group

Category of abelian groups

Abelian category

Abelian variety

Abel's theorem

Abel equation

Abel–Jacobi map

Abel–Ruffini theorem

Erlang distribution