The Banach list is changing its address. Messages should be sent to banach@mathdept.okstate.edu. The list location for subscribing or unsubscribing is now https://www.mathdept.okstate.edu/cgi-bin/mailman/listinfo/banach The URL for lists of past postings and other information is https://math.okstate.edu/people/alspach/banach/index.html My current address alspach@math.okstate.edu should continue to work but banach@math.okstate.edu will stop working sometime in the next few weeks. Best Wishes for the New Year, Dale Alspach