Field Notes / Σ /sym/3cad98
id=1 · host=formula-vault.cloud · 2026-10-19 07:54Z
∑_{k=1}^{n} k = n(n+1)/2
∑_{k=1}^{n} k = n(n+1)/2
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det| 3 6 ; 0 4 | = 12
468K
\frac{6}{1} \sum_{i=1}^{n} i^{2}
∑_{k=1}^{n} k = n(n+1)/2
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det| 9 8 ; 3 10 | = 66
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∂x/∂θ = 8x
det| 9 4 ; 1 10 | = 86
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