# Thread: test

1. ## test

test $x^-^2$

2. ## Re: test

Originally Posted by DavidCampen
test $x^-^2$
$$x^{-2}$$ gives $x^{-2}$.

When we have more then one character in an exponent, enclose with ^{}.

3. ## Re: test

Thank you.

Another test:

$a = \prod {p_i}^{a_i}$

$\{a\} = \{{p_i}^{a_i}\}$

$\{ a_{odd}\} = \{p_i}^{a_i} : 2\nmid{a_i}\}$

Proposition 2) If A and B are not square and AB is square then the sets $\{A_{odd}\}$ and $\{B_{odd}\}$ are non empty and $\{A_{odd}\} = \{B_{odd}\}$