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| 9 4 ; 1 10 | = 86
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
\oint_C \vec{F}\cdot d\vec{r} = 0
174K
∑_{k=1}^{n} k = n(n+1)/2
61K
∇²x = 0
\frac{2}{2} \sum_{i=1}^{n} i^{2}
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
det| 9 2 ; 3 10 | = 84
472K
E = mc²
∇²φ = 0