Symbol in context

$\theta_i^{*}$

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Meanings in context

Article-grounded definition

the old optimum for parameter i and $\lambda$ sets how strongly the old task is protected.

\mathcal{L}(\theta) = \mathcal{L}_{\mathrm{new}}(\theta) + \lambda \sum_{i} F_i\left(\theta_i - \theta_i^{*}\right)^2,

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

\theta_i^{*}

the old optimum for parameter i and $\lambda$ sets how strongly the old task is protected.