Expression.simplify() takes no "algorithm" keyword

asked 2023-12-07 01:22:17 +0200

GPN
61 ●2 ●11

Hi Sage experts.

I am trying to run the following example, which is really copied from the doc with slight modification to adapt it to my Jupyter notebook.

from sage. All import *
from IPython.display import display, Math, Latex

%display latex

x, t = var("x, t")
ex = cos(t).exponentialize()
ex = ex.subs((sin(t).exponentialize()==x).solve(t)[0]); display(ex)
ex.simplify(); display(ex)
ex.simplify(algorithm="sympy"); display(ex)

It runs nicely till the last line, which fails with the error TypeError: Expression.simplify() takes no keyword arguments. Since this line is copied from the doc, I am baffled.

I am using SageMath 9.5 on Ubuntu 22.04 and in the Jupyter notebook.

Thank you

GPN

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Comments

Version 10.1 does the job. To see if a method accepts some arguments, ask for its doc string. For instance, with the above definition of ex:

sage: ?ex.simplify

And this gives me in the present version:

Docstring:
   Return a simplified version of this symbolic expression.

   INPUT:

   * "algorithm" -- one of :

        * "maxima" : (default) sends the expression to "maxima" and
          converts it back to Sage

        * "sympy" : converts the expression to "sympy", simplifies it
          (passing any optional keyword(s)), and converts the result
          to Sage

        * "giac" : converts the expression...

(and so on, not too much place left in a comment.)