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█'██████ ███ ███████ █ ██ █████ ██ ██████ ████'██████ ███ ██ ██████ ███ █████████████ █████ ████ ██ █████ ███ ███████, ████ ████ █████ ██ ███ ██ ███████ ██████████████ █ █ ██████ ██ ███████ ███ █████ █████████ █ ██ ███ █████████ ███ ███████.

█'██████ ███ ███████ █████ ███ ██ ████████ ███ █████: ██ █████████████ ███ ███████, ███████, ███ ██████ █████████ ███████████ ██ ████████ ██ ████ █████████ ███ █████ █████████, ████ ███ ████ ███ █████ █████ █ ███████ ██ ████ █████████, ██ ███ ███████ ██ █████ █ ███████ ██ ██████ ███ ███████ ██ █████ █████ ████████ ██ █████ █████ ████████ ███████████ ███ █████████.

███ ██████████ █'███████ ███ ███████ ███ ███████ ████'███████████ ████████████████, ████████ █████████ ██ ██████████████ █ █████ █████████ ██ ███████:

${\displaystyle \overrightarrow{\mathrm{\nabla }}\times \overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}=\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+\frac{\mathrm{\partial }\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}{\mathrm{\partial }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}=\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+\frac{\mathrm{\partial }({\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}})}{\mathrm{\partial }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}$

█████████ ██ ██████ ███████ ███ ██████████████ ███ █████ █ ███████ █ ███ ██ █████ ███ ███ ██████████, ██ ███████:

${\displaystyle {\mathrm{\nabla }}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}-\frac{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}\frac{{\mathrm{\partial }}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{\partial }{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}={\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\frac{{\mathrm{\partial }}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{\partial }{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}}$

██ ██████ ███████ ██ ███████ █ ██████ ████'██████ ███ ██████ ████████ ██████ ████ █████████ ${\displaystyle \overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}={\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}$ █████ █████, ████, ████'██████ ██ ██████████ ███ █████ ███████████. ██ ██████ █████ ███ ████ ████'██████ ███████ ███████ ██████████ █████ ██ ██████████████ █'███████████ ███ █████ █ ██ ███ ███████, ████ ███ █████ █ ██████████ ██ ██████████████ ${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ █████ █████ ██ ███████ █ ██ █████████ ██ █████████ ███ ████ ██ ██████████████ █ ██ █████ █████████ █████ █████ ██ █████████ ██ ████████████ ███ █████. ██ ████ ████, ████████████ ██████ ███████, ██ ███ ████████ ██ ██████████████ ${\displaystyle \overline{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}$ ████ █████ ██ ███████ ███████ █ ███:

${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}={\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}({\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}+{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+...)}$

███████████ █ ███████████ ██ ███████ ██████████, ██ ███████ ███ ███████████ ${\displaystyle {\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}={\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}={\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})}({\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}.\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}.)}$ █████ █████████ █████ ████ ██ ███████ ██ ███████ ███ ███████ ████ █████████ ██████ ████████ █ ██████ ████████.

██████ ███████ ███ ███████ ██████ █████████ ██████████ ██████ █'█████████ ███ █████ █████████ ████████ ██ ████████ ████████ ██ ████ ████████ ████ █████████████ ███ █'█████ ███████ ██ █'█████████ █████████ █████ █████ ███ ███████ ██ ██████ ███ █████ ███████. ██ ████████ ██ █████ ███████████, ██ ███████ ██ ██████ █████, ██████ ██ ██ ███████ █████ ██ █████████████ ███ █ ██████████ █████ ██████ ███████████ (-) █ ███ ██████ (+). ██████ █████████████ █ ███ ██ ███ ██████ ████ ████████████ █████ ██████ ███████████ ████████ ████ ███ ██████████████ ████████, █████ ██ ██ █████ █████████ █████ ██ █████ █████ ███ ██████ ██ ████ ███████. ████████, ███████ ██████ █████ ███ ███████ █████ ██████ ███████████, ████ ███████ ███ ██████ ███████████ ██████████. ██ ██ █████████ ████ ██████ ██ ██████ ███ █████ ███████ (${\displaystyle \approx {\mathrm{<span\; word-length="2"\; class="word\; redacted">██</span>}}^{\mathrm{<span\; word-length="2"\; class="word\; redacted">██</span>}}}$) ██ █████████ █████████ (${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}=\frac{{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}$) █████████████ ██ ██^██ █·██^█.

███ ███████████ ███ █████████ ██████ ███████████ ██ █████████ █'█████████ █████ █████ ███ ████████ ██ ██ █████████ ██ ██ █████ ██████████ █ ██ █████ ███████ █████████:

${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\ddot{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}=\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}-\frac{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}-\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\dot{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}$