本刊英文版2015年58卷第3期摘要（英文）

<正>Which algebraic groups are Picard varieties?BRION Michel Abstract We show that every connected commutative algebraic group over an algebraically closed field of characteristic 0 is the Picard variety of some projective variety having only finitely many non-normal points.In contrast,no Witt group of dimension st least 3 over a perfect field of prime characteristic is isogenous to a Picard variety obtained by this construction.Keywords algebraic group,Picard variety,pinching