Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-18 23:41Z
d/dn [n^4] = 4n^3
\lim_{θ\to 0} \frac{\sin θ}{θ} = 1
∑_{k=1}^{n} k = n(n+1)/2
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\binom{n}{k} = \frac{n!}{k!(n-k)!}
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iħ ∂ψ/∂t = Ĥψ
det| 2 7 ; 7 3 | = -43
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\frac{2}{4} \sum_{i=1}^{n} i^{2}
det| 1 4 ; 3 2 | = -10
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det| 5 7 ; 5 6 | = -5
\frac{3}{2} \sum_{i=1}^{n} i^{2}
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Fe₂O₃ + 3CO → 2Fe + 3CO₂
iħ ∂ψ/∂t = Ĥψ
2r² + 6r + 7 = 0
5θ² + 9θ + 7 = 0