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2 votes

Existence of first variation

In general, a first variation is just the collection of all directional derivatives $\frac{d}{d\epsilon} \mathcal{F}(\rho+\epsilon\chi)|_{\epsilon = 0}$. For fixed $\rho$ one can treat them as a funct …
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Derivative of Wasserstein distance $W^p_p$ along solutions of the continuity equation (contr...

Without having read the sources in detail, I would notice the following: In (4) the second measure is time independent. To satisfy (1) this then corresponds to $(\rho^{(2)}_t,v_t^{(2)}) = (\nu,0)$. Bu …
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