html-math/erb -> html-math

Here's another message not returned from the W3 mail server.

-Ron

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The location of information I'm placing on the AMS server is now
http://www.ams.org/html-math/.  Previously the information had been
kept in an "erb" subdirectory, but all reference to ERB in connection
with our work is now considered a potential embarrassment.

Let me know if anyone has access problems.

-Ron