Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:06Z
\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| 7 4 ; 4 8 | = 40
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
\binom{n}{k} = \frac{n!}{k!(n-k)!}
174K
∇²x = 0
∑_{k=1}^{n} k = n(n+1)/2
380K
\oint_C \vec{F}\cdot d\vec{r} = 0
335K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∑_{k=1}^{n} k = n(n+1)/2
472K
E = mc²
∇²φ = 0
\lim_{x\to 0} \frac{\sin x}{x} = 1
12z² + 7z + 6 = 0