Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:55Z
∑_{k=1}^{n} k = n(n+1)/2
det| 7 9 ; 1 8 | = 47
446K
3x² + 3x + 6 = 0
det| 9 4 ; 1 10 | = 86
144K
∇²t = 0
7z² + 2z + 0 = 0
det| 11 5 ; 0 12 | = 132
218K
∑_{k=1}^{n} k = n(n+1)/2
354K