Σ index Eq pack 19 Rxn set 20 Rxn set 26 Σ#24 Σ#12 Ledger /21 Eq pack 13 Ledger /3 Eq pack 1 Batch 16 Σ#18 Σ#6 Ledger /15 Batch 4

Field Notes / Σ /sym/3cad98

id=1 · host=formula-vault.cloud · 2026-10-20 00:09Z

∑_{k=1}^{n} k = n(n+1)/2

∇ × E = −∂B/∂t

168K

\binom{n}{k} = \frac{n!}{k!(n-k)!}

446K

3x² + 3x + 6 = 0

2H₂ + O₂ → 2H₂O

144K

det| 7 4 ; 4 8 | = 40

371K

∇²t = 0

Fe₂O₃ + 3CO → 2Fe + 3CO₂

259K

det| 3 1 ; 7 4 | = 5

86K

∇ × E = −∂B/∂t

224K

10ψ² + 5ψ + 0 = 0

234K

11t² + 9t + 5 = 0

218K

F = G m₁m₂ / r²

354K

∫₀^∞ e^(-t²) dt = √π / 2

70K

λ = h/p

402K