t??t dim B 1 dim B 2 ? ????? R 1 ? R 2 = {0}? t?? ??r???s? f 1 × f 2 : X ? B 1 × B 2 ?s ???t? ??t? ?ts ?????? ?ss??? ,
X)? t??r? ?r? ????t?? t?? ????s V 1 ??? V 3 ? ?? ?????s??? 2? ???s? ??t?r? s??t???s ??t? V 2 ?r? ??tr???? r??s ?? ??(X)? ??? ??? ?? t??s s??t??? ,
(r, s) ?? B 1 × B 2 ??t? r, s ? {1, s??????r?t??s s??? t??t ?(Y ) = 2 ??? Nef(Y ) = Psef ,
P 1 ) n?3 × B 1 ?s 1 ?r 2? ??????r??? ???rs ?? X ? (P 1 ), ) ?? B 1 ×B 2 ?? Pr???s?t??? ?????? ??t? t??t t??r? ?s ? ??t?r?? ?s?? ??r???s? Pic((P 1 ) n?3 × B 1 × B 2 ) ? = Pic., d n?3 , k, l) ??, pp.3-4 ,
× X 2 ? ???r? X 1 = (P 1 ) r ??t? s??? r 0 ??? X 2 ?s ? ??r??t? ,
P 1 ) n?3 × W ?s ?? ???r?? 2? ??t V ?? t?? ???????? ?? (P 1 ) n?3 × W ?? t?? ??t?r?? ??r???s)? ????? X ? = X 1 ×X 2 ? ???r? X 1 = (P 1 ) r ??? X 2 ?s ? ??r??t? ,
??? p = q = b 1 = b 2 = 1? ????? t?? ??r???s? X ? (P 1 ) n?3 ×W ?s ?? ???r?? 4? ??r????r? ?K X ?b 1 H 1 ?b 2 H 2 ?s ????r?????? tr????? ?? t?? ???rs ?? t?? ???? ??r?t??? X ? (P 1 ) n?3 ? ???s ?? ??t??? t??t a 1 ,
? (P 1 ) n?3 × B 1 × B 2 ? ???s t??s ?r???? ????s ?s ??r????t?? ???r (P 1 ) n?3 × B 2 ? ?????? t?? ??t?r?? ??r???s? V ? (P 1 ) n?3 × B 2 ?s ? ??r?t??? ??? ?t ??s r?????? ???rs ???r s, ?s ?r?????? ????? s??? ????s?r ?? ???r??, p.2 ,
P 1 ) r × B 2 ?? t?? ??r?t??? V ? (P 1 ) r × B 2 ?s r??????? ?? ???? D = f * (f (D)) ??? D ?s ?? ???t ?????r?? ?q???????t t? t?? ,
P 1 ) n?3 × P 2 ??? f ??????s ? ???t? s?r???t??? ??r???s? g : X ? (P 1 ) ,
Z 1 × Z 2 s??? t??t Z 1 ?s ? ?????? ????r ?? (P 1 ) r ??r s??? r 3?, )? ??? Z 2 ?s ,
?2)???r??s ??r X a ? X * ??? ?? ??t??? X? ??t? t??t t??s? ?r? ??st t?? ??r?t????? tr??s??r??t???s ,
q r ?? r ????r??t ????ts ?? P 1 ??t? r 4? t??? t??r? ???st ? s???t? ??r?? E? ? 4 : 1 ?????s ????r ? : E ? P 1 ??t? ?????s ?r ,
1 ? ?? t?? ??r??????t? ?? A ?s ?t ??st 3? t??? t??r? ?s ? ???t? ????r ? : P 1 ? P 1 s??? ,
1 ?? g · [y 1 : y 2 ] ? [?y 1 : y 2 ] ???r? X ) [?m] ) = {0} ??r s??? m > 0 ?s??, 1? K T 2 · F 2 = ?1? E 2 · F 2 = ?1? ??t q ?? t?? ??r?t??? T 2 ? S? ?? ???? ???? ???? E 1 ??? E 0 ?? T 2 ? ??t H ?? ?? ????? Q?????s?r s??? t??t ,
? X 1 ?s 1 ?? t?? ???s???t? t???r?? ?s?? ,
?t w 1 ? X 1 s??? t??t ?(w 1 ) = w ??? t?? ?rst t?? ???r????t?s ?? w 1 ?r? ??? ??????r?? ???r? ?r? t? ) = C ?s r?????? ????t?? ?t t??s? 6 ????ts ??t? ???r?? 6? ?? t?? r??????t??? ??r???? g(C), ) = 0? ???r? g(C) ?s t?? ????s ?? C? ????? C ?s ? s???t? r?t????? ??r??? ???s ??????s t??t X ?s ???r????? ????? X ??s P???r? ?????r ,
X * ) [?m] ) ,
0 ?s s???t?? t?? Q???rt??r ??? ??s?r ????? ?ss????t?s t? t?? ??t?r, Z ) sat | X 0 ?s ?q??? t? p * (K Z + ????r? ?????? ????? det Z ) sat )? ???s J · ? < 0? ????? H 0 (X, ((p * ? 1 Z ) sat ) [?m] ) = {0} ??r s??? m > 0? ?? ???? H 0 (X, H ?s [?]J ?t ) = {0} ,
X ) [?m] ) = {0} ??r s??? m > 0? ??t f : X X * ?? ,
X ) [?m] )? ???? ? ??????s ? r?t????? s??t??? ? ? ?? (? 1 ? ) [?m], ? ) [?m] ) t? H 0 (X, (? 1 X ) [?m] ) ,
(D)? ???s t??r? ?s ? s???t? q??s???r????t??? ??r?? C ?? D s??? t??t ? ?s s???t?, ? ) [?m] )? ?? t?? ????t s?q????? ?? ??????? ?r?? s?????s ? 1, p.1 ,
X ) [?m] )? ???s ?s, P 1 ) sat ) ,