Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:02Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
\frac{11}{6} \sum_{i=1}^{n} i^{2}
66K
∑_{k=1}^{n} k = n(n+1)/2
222K
∑_{k=1}^{n} k = n(n+1)/2
det| 9 4 ; 1 10 | = 86
87K
\binom{n}{k} = \frac{n!}{k!(n-k)!}
2K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
∇²x = 0
det| 7 1 ; 7 8 | = 49
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∇ × E = −∂B/∂t
E = mc²
∇²φ = 0
\lim_{x\to 0} \frac{\sin x}{x} = 1
12z² + 7z + 6 = 0