Can you clarify what you mean by this? The precedence of operators in Python is determined by the language. See https://docs.python.org/3/reference/expressions.html#operator-precedence. Unary - has a higher precedence than binary + (or binary -).
In SymPy, -x is represented as (-1)*x, but this is done after Python parses the expression and converts them into SymPy objects. In Python, x - y is different from x + -y. In the former, - is a binary operator and the latter it is a unary operator. They both use the same symbol because it's unambiguous which is which. SymPy represents these both as x + (-1)*y because this makes things simpler, but this is only because it converts them both to that canonical form. Aaron Meurer On Wed, Mar 24, 2021 at 2:13 PM Paul Royik <[email protected]> wrote: > > Is there any reason why precedence of -x equals precedence of Add? > -x is (-1)*x > > -- > You received this message because you are subscribed to the Google Groups > "sympy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sympy/604cbda3-7b2f-4bb7-af4c-2f3b532edaa5n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/CAKgW%3D6JV_900%2Bykw-a2pWGZF5aGU4YOpFokFr%3Dyb0TEtHdLdpg%40mail.gmail.com.
