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
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 5 9 ; 0 6 | = 30
61K
∇²x = 0
CH₄ + 2O₂ → CO₂ + 2H₂O
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
E = mc²
∇²φ = 0