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
66K
∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
87K
\oint_C \vec{F}\cdot d\vec{r} = 0
2K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
\lim_{z\to 0} \frac{\sin z}{z} = 1
61K
∇²x = 0
\lim_{r\to 0} \frac{\sin r}{r} = 1
119K