Open
Description
I think that for all symbolic expression s should hold
sage: s == s.operator()(*s.operands())
That currently does not work, for two reasons.
- There may be no operator at all:
sage: print x.operator()
None
sage: x.operands()
[]
I believe there should instead be an identity operator.
- The list of operands may be longer than what the operator accepts:
sage: s = 0.001*x^2+0.01*x+0.1*sin(1.01*x)+1
sage: s.operands()
[0.00100000000000000*x^2, 0.0100000000000000*x,
0.100000000000000*sin(1.01000000000000*x), 1]
sage: s.operator()(*s.operands())
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/home/king/<ipython console> in <module>()
TypeError: op_add expected 2 arguments, got 4
Compare this thread at sage-devel.
CC: @eviatarbach
Component: symbolics
Keywords: operator operands symbolics
Issue created by migration from https://trac.sagemath.org/ticket/10169