Field Notes / Σ /sym/b26508
id=1 · host=uk.mattivster.me · 2026-10-18 16:41Z
∑_{k=1}^{n} k = n(n+1)/2
det| 8 9 ; 3 9 | = 45
∑_{k=1}^{n} k = n(n+1)/2
90K
det| 7 4 ; 4 8 | = 40
438K
E = mc²
det| 10 1 ; 6 11 | = 104
det| 2 6 ; 5 3 | = -24
det| 9 2 ; 3 10 | = 84
390K