Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-20 00:12Z
∑_{k=1}^{n} k = n(n+1)/2
3x² + 3x + 6 = 0
∇²t = 0
∑_{k=1}^{n} k = n(n+1)/2
86K
7z² + 2z + 0 = 0
det| 4 2 ; 5 5 | = 10
det| 11 9 ; 0 12 | = 132
218K
2H₂ + O₂ → 2H₂O
∫₀^∞ e^(-θ²) dθ = √π / 2
70K
\lim_{x\to 0} \frac{\sin x}{x} = 1