In the following code, the alignment position for & is computed automatically:
\begin{align*}
x^2 + y^2 &= 1 \\
y &= \sqrt{1 - x^2}.
\end{align*}
Now, I'd like to have all my equality signs (over many equations/aligns in many sections and subsections) aligned at the same position, preferably by just manually giving a position. Is this possible, and how?
\intertext{...}, as far as i know). in the case, that some one know, how to do this, i not recommend to doing this. the result will not be nice. – Zarko May 18 '18 at 09:14