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
Stefan Bergman "An initial value problem for a class of equations of mixed type," Bulletin of the American Mathematical Society, Bull. Amer. Math. Soc. 55(2), 165-174, (February 1949)
