What is the Sympy function for $\nu_2(n)$ the 2-adic valuation of $n$?

[Luna Tuna]

Hi, googling turns up nothing. 

Was wondering if Sympy has a v_2(n) function such that it's part of the expression tree and so Sympy knows about rules such as v_2's complete additivity, i.e. v_2(xy) = v_2(x) + v_2(y) and so on and can thus simplify expressions involving it if possible.

Thanks!

[Aaron Meurer]

This is the closest thing. It is only in the development version of SymPy, but 1.10 will be released with it soon. https://docs.sympy.org/dev/modules/polys/numberfields.html#p-adic-valuation

Depending on what you want to do you can easily define your own by subclassing Function and defining the appropriate methods.

Aaron Meurer

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