Hello,
Some symbolic expressions claim that they are not real
sage: cos(pi/7).is_real()
False
sage: (exp(I*pi/7) + exp(-I*pi/7)).is_real()
False
But conversion to real floating points perfectly works
sage: RR(cos(pi/7))
0.900968867902419
sage: RR(exp(I*pi/7) + exp(-I*pi/7))
1.80193773580484
I guess we could (and should) make it consistent. See also the related
#16436.
Vincent
--
You received this message because you are subscribed to the Google Groups
"sage-devel" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sage-devel+unsubscr...@googlegroups.com.
To post to this group, send email to sage-devel@googlegroups.com.
Visit this group at https://groups.google.com/group/sage-devel.
For more options, visit https://groups.google.com/d/optout.
