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| 11 4 ; 5 12 | = 112
168K
det| 4 8 ; 3 5 | = -4
446K
3x² + 3x + 6 = 0
∇²t = 0
det| 1 4 ; 3 2 | = -10
259K
Fe₂O₃ + 3CO → 2Fe + 3CO₂
86K
∑_{k=1}^{n} k = n(n+1)/2
234K