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
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
d/dz [z^11] = 11z^10
174K
\frac{8}{6} \sum_{i=1}^{n} i^{2}
61K
∇²x = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
335K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
\binom{n}{k} = \frac{n!}{k!(n-k)!}
119K
∇ × E = −∂B/∂t
E = mc²
∇²φ = 0