(Na) = the NPC of AA2A3

A*b = the orthogonal projection of P*a on AC

A*2 = the reflection of A in A*b

(= the other than A intersection of the circle (P*a, P*aA) and AC)

A*c = the orthogonal projection of P*a on AB

A*3 = the reflection of A in A*c

(= the other than A intersection of the circle (P*a, P*aA) and AB)

(N*a) = the NPC of AA*2A*3

Ra = the radical axis of (Na) and (N*b)

Similarly Rb and Rc.

The Ra,Rb,Rc are concurrent.

The parallels to Ra,Rb,Rc through A,B,C, resp. concur at a fixed point

[X(74)]

Antreas