ARKIV FÖR MATEMATIK
journal47112
E014664
SE
0004-2080
English:(French and German)
Rivista
Institut Mittag-Leffler:Auravagen 17, S-182 60 Djursholm Sweden:011 46 8 6220560, EMAIL: hallberg@ml.kva.se, leffler@ml.kva.se, Fax: 011 46 8 6220589
1949
can
cannot
false