...bicircular quartic. Three foci of a bicircular quartic being given it is shown how the fourth focus may be found and also the relations subsisting between any three focal distances (p. 66). D 2 b. GA GIBSON. An Extension of Abel's Theorem on the Continuity of a Power Series. Proof...

...bicircular quartic. Three foci of a bicircular quartic being given it is shown how the fourth focus may be found and also the relations subsisting between any three focal distances (p. 66). D 2 b. GA GIBSON. An Extension of Abel's Theorem on the Continuity of a Power Series. Proof...

...= 0, where !, m, n are known. It will be shown how the fourth focus E (lying upon the circuincircle of ABC) may be found ; and also the relations subsisting...three focal distances. If x, y, z be masses placed at А, В, С respectively and P any point in the plane of ABC, where E (the centroid of the masses) has...