Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:22Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
222K
∑_{k=1}^{n} k = n(n+1)/2
det| 1 1 ; 5 2 | = -3
87K
\lim_{β\to 0} \frac{\sin β}{β} = 1
2K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 7 3 ; 6 8 | = 38
61K
∇²x = 0
\frac{8}{6} \sum_{i=1}^{n} i^{2}
380K
∑_{k=1}^{n} k = n(n+1)/2
335K
det| 9 4 ; 1 10 | = 86
472K