Komlós conjecture (Conjecture 5.1.5). There exists an absolute constant $K > 0$ such that for any vectors $v_1, \dots, v_m \in \mathbb{R}^n$ with $\|v_i\| \leq 1$, one can choose signs $\varepsilon_i \in \{\pm 1\}$ so that $\left\|\sum_i \varepsilon_i v_i\right\|_\infty \leq K$.