Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:54Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
446K
3x² + 3x + 6 = 0
Fe₂O₃ + 3CO → 2Fe + 3CO₂
144K
∇²t = 0
7z² + 2z + 0 = 0
det| 12 2 ; 2 13 | = 152
234K
det| 4 2 ; 5 5 | = 10
det| 3 1 ; 7 4 | = 5
354K
det| 9 4 ; 1 10 | = 86
70K