Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-19 03:00Z
\frac{1}{3} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
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∑_{k=1}^{n} k = n(n+1)/2
det| 10 7 ; 3 11 | = 89
87K
\lim_{φ\to 0} \frac{\sin φ}{φ} = 1
det| 2 7 ; 7 3 | = -43
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det| 9 9 ; 5 10 | = 45
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