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What do you call boolean functions which are identical accurate to argument order?

EDIT1

I meant not symmetric function.

I mean, for example, implication function with truth table

00=1 01=1 10=0 11=1

and the function

00=1 01=0 10=1 11=1

i.e. giving the same if arguments exchanged.

What do you call the relation of these functions to each other?

I.e.

$$f_1(x_1,x_2,...,x_k,...,x_l,...x_n)=f_2(x_1,x_2,...,x_l,...,x_k,...x_n)$$

i.e. the positions of arguments $k$ and $l$ was exchanged, which gave different function.

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    If we have a boolean function $f$, or any other kind from $A^n$ to $B$, and a *particular* permutation $\pi$, you can talk about the function *induced* by $\pi$. I do not know of a special name in the Boolean case.2012-06-18

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