Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:20Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 10 7 ; 3 11 | = 89
174K
∇²x = 0
det| 7 4 ; 4 8 | = 40
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂