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
det| 9 4 ; 1 10 | = 86
222K
∑_{k=1}^{n} k = n(n+1)/2
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
174K
\frac{11}{6} \sum_{i=1}^{n} i^{2}
61K
∇²x = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
E = mc²