▁direct ors ▁Category : W rit ers ▁from ▁São ▁Paulo ▁Category : W omen ▁screen writ ers <0x0A> </s> ▁This ▁is ▁a ▁list ▁of ▁the ▁notation ▁used ▁in ▁Alfred ▁North ▁White head ▁and ▁Ber tr and ▁Russell ' s ▁Princi p ia ▁Mathemat ica ▁( 1 9 1 0 – 1 3 ). ▁ ▁The ▁second ▁( but ▁not ▁the ▁first ) ▁edition ▁of ▁volume ▁I ▁has ▁a ▁list ▁of ▁notation ▁used ▁at ▁the ▁end . ▁ ▁G loss ary ▁ ▁This ▁is ▁a ▁gl oss ary ▁of ▁some ▁of ▁the ▁technical ▁terms ▁in ▁Princi p ia ▁Mathemat ica ▁that ▁are ▁no ▁longer ▁widely ▁used ▁or ▁whose ▁meaning ▁has ▁changed . ▁ ▁Symbol s ▁introduced ▁in ▁Princi p ia ▁Mathemat ica ▁volume ▁I ▁ ▁Symbol s ▁introduced ▁in ▁Princi p ia ▁Mathemat ica ▁volume ▁II ▁ ▁Symbol s ▁introduced ▁in ▁Princi p ia ▁Mathemat ica ▁volume ▁III ▁ ▁See ▁also ▁G loss ary ▁of ▁set ▁theory ▁ ▁Notes ▁ ▁References ▁ ▁White head , ▁Alfred ▁North , ▁and ▁Ber tr and ▁Russell . ▁Princi p ia ▁Mathemat ica , ▁ 3 ▁vol s , ▁Cambridge ▁University ▁Press , ▁ 1 9 1 0 , ▁ 1 9 1 2 , ▁and ▁ 1 9 1 3 . ▁Second ▁edition , ▁ 1 9 2 5 ▁( Vol . ▁ 1 ), ▁ 1 9 2 7 ▁( V ols ▁ 2 , ▁ 3 ). ▁ ▁External ▁links ▁▁ ▁List ▁of ▁notation ▁in ▁Princi p ia ▁Mathemat ica ▁at ▁the ▁end ▁of ▁volume