Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:01Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
∫₀^∞ e^(-x²) dx = √π / 2
2K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 9 4 ; 1 10 | = 86
174K
∇²x = 0
det| 1 4 ; 0 2 | = 2
380K
∑_{k=1}^{n} k = n(n+1)/2
335K