December^ igiz *AO»««« ■, . x^ 



PROCEEDINGS 



OF THE 



ROYAL IRISH ACADEMY 



Volume XXX, Section A, No. 6 



THOMAS ROCHE 



THE QUADRATIC VECTOR FUNCTION 



DUBLIN 



HODGES, FIGGIS, & CO., Ltd. 



LONDON : WILLIAMS & NORGATE 



I912 



Price Sixpence 



