eq:AAA_curlcurl
Equation AAA_curlcurl
\nabla\times\mathbf{B}
&=
\nabla\times\nabla\times \int_{0}^{t} K_B(t-\tau)\,\mathbf{J}(\mathbf{x},\tau)\,d\tau \nonumber\\
&=
\nabla\!\left(\nabla\cdot \int_{0}^{t} K_B\,\mathbf{J}\,d\tau\right)
-
\nabla^{2}\!\left(\int_{0}^{t} K_B\,\mathbf{J}\,d\tau\right).
Source
Appendix AAA — Magnetism as a Consequence of Historical Matter Closure — Gravity as a Temporally Closed Dynamical Phase
Gravity as a Temporally Closed Dynamical Phase/51_ppendix AAA — Magnetism as Historical Matter Closure.tex