Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:25Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
\binom{n}{k} = \frac{n!}{k!(n-k)!}
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
174K
∇²x = 0
∫₀^∞ e^(-φ²) dφ = √π / 2
380K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∇ × E = −∂B/∂t