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}
det| 9 5 ; 6 10 | = 60
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∑_{k=1}^{n} k = n(n+1)/2
det| 7 4 ; 4 8 | = 40
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\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
∇²x = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
∫₀^∞ e^(-φ²) dφ = √π / 2
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