I." PARTIE. CHAP. IL

fonction

,.ooH-oo = oo, co — 00 = M (( — 00 , -4- 00 j) ;

0x0 = 0, oxco = ox — 00^=' M{[ — 00, -Hoo;); ooxoo = — cox — oo = co, oox — 00 = — 00;

ro -^, ,.00 00 —00 .

=^—00 , +oc) , — = =0, — = = ± 00 ,

, ■ = =.V(o,oo), = = yW(^--co,o);

icx> — co ^^ " —00 co

o°=oo°=y1f ((o, 00)), o*— oo~=° = o, 0~^=00«=:CO, ï» = i-«' = /1^((o, co));

10 ° =00° =0 oa co, 0=c =oo-» =:M((o.,,, i))