Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-18 02:42Z
ΔS ≥ 0
\frac{1}{2} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
90K
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
394K
det| 9 4 ; 1 10 | = 86
29K
det| 12 3 ; 4 13 | = 144
94K