Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:16Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
168K
3x² + 3x + 6 = 0
det| 9 4 ; 1 10 | = 86
144K
∇²t = 0
det| 3 7 ; 2 4 | = -2
259K
7z² + 2z + 0 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
224K