4 1 2 5 1 5 6 / http :// www . math . rut gers . edu / h ha / gen info . html ▁( Hom ology , ▁Hom ot opy ▁and ▁App lications ) ▁▁▁ ▁Category : 1 9 3 7 ▁birth s ▁Category : L iving ▁people ▁Category : Math emat icians ▁from ▁Philadelphia ▁Category : Cent ral ▁High ▁School ▁( Ph il adel phia ) ▁al umn i ▁Category : Univers ity ▁of ▁Pennsylvania ▁al umn i ▁Category : Mc G ill ▁University ▁fac ulty ▁Category : Can ad ian ▁mathemat icians ▁Category : Can ad ian ▁computer ▁scient ists ▁Category : Ang lo phone ▁Quebec ▁people ▁Category : Category ▁the or ists <0x0A> </s> ▁The ▁first ▁known ▁use ▁of ▁the ▁phrase ▁" the ▁pity ▁of ▁war " ▁was ▁by ▁Wil fred ▁O wen ▁in ▁ 1 9 1 8 , ▁in ▁the ▁pre face ▁to ▁his ▁collected ▁po ems . ▁It ▁also ▁appears ▁in ▁his ▁poem ▁" Str ange ▁Me eting ", ▁included ▁in ▁that ▁volume . ▁ ▁The ▁P ity ▁of ▁War ▁may ▁also ▁refer ▁to : ▁ ▁The ▁P ity ▁of ▁War : ▁Exp la ining ▁World ▁War ▁I , ▁a ▁non - f iction ▁book ▁by ▁Ni all ▁Fer g us on ▁( 1 9 9 8 ) ▁The ▁P ity ▁of ▁War , ▁a ▁ 2 0 1 4 ▁TV ▁document ary ▁presented ▁by ▁Ni all ▁Fer g us on ; ▁see ▁BBC ▁World ▁War ▁I ▁cent en ary ▁season # H istor