For a problem set I'm making today, I made up a random symbolic function, then evaluated it and got confusing/inconsistent behavior. See below:
~$ sage-develop ┌────────────────────────────────────────────────────────────────────┐ │ SageMath version 7.2.beta5, Release Date: 2016-04-21 │ │ Type "notebook()" for the browser-based notebook interface. │ │ Type "help()" for help. │ └────────────────────────────────────────────────────────────────────┘ ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓ ┃ Warning: this is a prerelease version, and it may be unstable. ┃ ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛ sage: f(x) = e^(pi*x) + asin(x) + 1/(x^2 - x- e) sage: f(1.1) # should this be NaN since asin(x) not defined? What is this output!? Print bug? 1/(-e + 0.110000000000000) + e^(1.10000000000000*pi) sage: N(f(1.1)) # yep NaN sage: N(1/(-e + 0.110000000000000) + e^(1.10000000000000*pi)) # What? 31.2987079491022 sage: f(1.1).simplify() # The NaN at the beginning makes sense... NaN + 1/(-e + 0.1100000000000001) + e^(1.1*pi) I'm worried maybe there is a printing bug or something in f(1.1)... -- William (http://wstein.org) -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-support+unsubscr...@googlegroups.com. To post to this group, send email to sage-support@googlegroups.com. Visit this group at https://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/d/optout.
