If you need an accessible version of this item please contact JSTOR User Support
Annals of Mathematics
Second Series, Vol. 68, No. 2 (Sep., 1958), pp. 372-377
Published by: Annals of Mathematics
Stable URL: http://www.jstor.org/stable/1970252
Page Count: 6
You are not currently logged in.
Access your personal account or get JSTOR access through your library or other institution: