▁the ▁following ▁dec ades , ▁Hen stock ▁developed ▁extens ively ▁the ▁distinct ive ▁features ▁of ▁his ▁theory , ▁invent ing ▁the ▁concepts ▁of ▁division ▁spaces ▁or ▁integration ▁bases ▁to ▁demonstrate ▁in ▁general ▁settings ▁the ▁properties ▁and ▁characteristics ▁of ▁mathematical ▁integration . ▁His ▁theory ▁provides ▁a ▁un ified ▁approach ▁to ▁non - absolute ▁integral , ▁as ▁different ▁kinds ▁of ▁Hen stock ▁integral , ▁choosing ▁an ▁appropriate ▁integration ▁basis ▁( div ision ▁space , ▁in ▁Hen stock ' s ▁own ▁termin ology ). ▁It ▁has ▁been ▁used ▁in ▁differential ▁and ▁integral ▁equations , ▁harm onic ▁analysis , ▁probability ▁theory ▁and ▁Fe yn man ▁integration . ▁N umer ous ▁mon ograph s ▁and ▁texts ▁have ▁appeared ▁since ▁ 1 9 8 0 ▁and ▁there ▁have ▁been ▁several ▁con ferences ▁devoted ▁to ▁the ▁theory . ▁It ▁has ▁been ▁taught ▁in ▁standard ▁courses ▁in ▁mathematical ▁analysis . ▁ ▁Hen stock ▁was ▁author ▁of ▁ 4 6 ▁journal ▁papers ▁in ▁the ▁period ▁ 1 9 4 6 ▁to ▁ 2 0 0 6 . ▁He ▁published ▁four ▁books ▁on ▁analysis ▁( The ory ▁of ▁Integr ation , ▁ 1 9 6 3 ; ▁Linear ▁Analysis , ▁ 1 9 6 7 ; ▁L ect ures ▁on ▁the ▁Theory ▁of ▁Integr ation , ▁ 1 9 8 8 ; ▁and ▁The ▁General ▁Theory ▁of ▁Integr ation , ▁ 1 9 9 1 ). ▁He ▁wrote ▁ 1 7 1 ▁reviews ▁for ▁Math S ci Net . ▁In ▁ 1 9 9 4 ▁he ▁was ▁awarded ▁the ▁Andy ▁Prize ▁of ▁the