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 00:19Z

∑_{k=1}^{n} k = n(n+1)/2

∑_{k=1}^{n} k = n(n+1)/2

168K

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

446K

3x² + 3x + 6 = 0

det| 7 4 ; 4 8 | = 40

144K

det| 5 3 ; 7 6 | = 9

371K

∇²t = 0

det| 4 2 ; 6 5 | = 8

259K

N₂ + 3H₂ ⇌ 2NH₃

86K

e^{i\pi} + 1 = 0

224K

∑_{k=1}^{n} k = n(n+1)/2

234K

∇ × E = −∂B/∂t

218K