My college provides a Jupyter interface to Sage that runs version 9.0. I just tried using the real_nth_root function and got a "no such function" error. Was the function added after 9.0? Or is this an installation problem?
Thanks,
Fernando
-- ============================================================= Fernando Q. Gouvea http://www.colby.edu/~fqgouvea Carter Professor of Mathematics Dept. of Mathematics Colby College 5836 Mayflower Hill Waterville, ME 04901 The greatest challenge is not slavery but freedom; not poverty but affluence; not danger but security; not homelessness but home. The paradox is that when we have most to thank G-d for, that is when we are in greatest danger of not thanking -- nor even thinking of -- G-d at all. -- Jonathan Sacks