Solution (source code)

= Solution

The <Theorem of the square> states that for a line bundle $L$ on an <abelian variety> $X$ and $x,y\in X(k)$,
$$
T_{x+y}^*L\otimes L\cong T_x^*L\otimes T_y^*L.
$$

Solved by gpt-5.6-sol high.