Registered users receive a variety of benefits including the ability to customize email alerts, create favorite journals list, and save searches.
Please note that a Project Euclid web account does not automatically grant access to full-text content. An institutional or society member subscription is required to view non-Open Access content.
Contact customer_support@projecteuclid.org with any questions.
View Project Euclid Privacy Policy
Kazunori Kikuchi "Positive $2$-spheres in $4$-manifolds of signature $(1,n)$.," Pacific Journal of Mathematics, Pacific J. Math. 160(2), 245-258, (1993)
