Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:19Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
66K
∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 11 4 ; 5 12 | = 112
174K
det| 11 9 ; 0 12 | = 132
380K
∑_{k=1}^{n} k = n(n+1)/2
335K