How to check if two terms are equal but not identical

[Peter]

Hi everybody,

for my recent project I have to check using sympy if two terms are equal or identical.

Example:

• x+2=5 and x+5=8 - these two terms are equal (equivalent) but they are not identical
• x+2=5 and x+2=5 - these are equal and identical

Question:

Is it possible to differentiate between "equal" and "identical"? If so - how do I achieve this?

Thanks a lot!

Peter

[Christophe Bal]

Hello.

Have you tried to simplify exp_1 - exp_2 to see if it is equal to zero ?

Christophe BAL

Enseignant de mathématiques en Lycée et développeur Python amateur

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French math teacher in a "Lycée" and Python amateur developer

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[Peter]

Yes I did so...

Meanwhile, I think my main problem is that I've to call sympy from a PHP site. 

When I try it via the shell , it will work for me now ...

If I'm right, the problem will arise with the following part of the code:

transformations=(standard_transformations + (implicit_multiplication_application,) + (function_exponentiation,)+(convert_xor,))
print(latex(parse_expr(sys.argv[1], transformations=transformations)))