Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:21Z
\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
2K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
Fe₂O₃ + 3CO → 2Fe + 3CO₂
61K
∇²x = 0