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JJ

This entry links every published equation using this exact notation. Its meaning may change between equations.

Meanings in context

Used in 12 equations

Hint(n)=ℏΩ J⋅σ(n)2j,Un=exp⁡ ⁣(−iκJ⋅σ(n)2j),H_{\mathrm{int}}^{(n)} =\hbar\Omega\, \frac{\mathbf J\cdot\boldsymbol\sigma^{(n)}}{2j}, \qquad U_n=\exp\!\left(-i\kappa \frac{\mathbf J\cdot\boldsymbol\sigma^{(n)}}{2j}\right),

A Reference Frame Becomes Classical by Publishing Its Orientation · Equation 80

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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∇θJ(θ)=Eπ ⁣[∑t=0T∇θlog⁡πθ(at∣st)(∑t′≥trt′)].\nabla_\theta J(\theta) = \mathbb{E}_\pi\!\left[\sum_{t=0}^{T} \nabla_\theta \log \pi_\theta(a_t \mid s_t) \left(\sum_{t' \ge t} r_{t'}\right)\right].

The Hardest Unsolved Problems in AI Agent Architecture · Equation 1

This equation states a bound: one expression must stay on the indicated side of the other under the article’s assumptions.

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J(θ)=Ex∼D, y∼πθ(⋅∣x)[r(x,y)]−βDKL(πθ(⋅∣x) ∥ πref(⋅∣x))J(\theta) = \mathbb{E}_{x \sim \mathcal{D},\ y \sim \pi_\theta(\cdot \mid x)}\left[r(x,y)\right] - \beta D_{\mathrm{KL}}\left(\pi_\theta(\cdot \mid x) \,\|\, \pi_{\mathrm{ref}}(\cdot \mid x)\right)

Claude, From First Principles: Training, Constitutional Methods, and What Actually Shapes a Response · Equation 6

This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.

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