███████ ██████-█████

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

████████ ██ █████ ██████ █████, ██████ ███ ████████ ███████ ███████ ████, ████ █████ ███ ██████ ██████ ███, █████ █████, ██████ █████ ███ ██ ████. ███ ██ ██, ████ █████ ████████ ██████ ██████, ███ ███ ████ █████ ███ ████ █████ (██"█ ██ ██████ ██ ██████, ██████ █████████, ██████ █████), ███ ██ ████ ██████ ████ ███████ ███████ ████ ██████ ███████████ ██ ██ ████████. █████ ███ ██████ ██ ███ ████ ████ ████████ ████ ████ ██████ ███████ ███████ █████ ████████, ███ ████ ███ ████ █████ ██ █,███,███ ██████ █████ ██████ ██████ ████ ██. █████ █████, █████ ███, ██ ████ ████ ██████, ███ ███ █████ ████ ██████ ██ █████ ████ ██████ █████.

███████ ██████-█████ ██ ███████ ████████████. ████ █████ ██ ████████ ███ ██████ ███ ████, ███ █████ ████ ███████ ███████ ██ █████ ███, █████ ███ ██████ ██████. █████ ████████ ███ ███ ██████ ████ █████ ██ ██████ █████ ███ █████ █████ █████. ████ ███ ███████ ████ ████ █████ █████████ █████.

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

${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}\left(\frac{\mathrm{\partial }\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{\partial }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}+\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}\cdot \mathrm{\nabla }\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}\right)=-\mathrm{\nabla }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}+\mathrm{\nabla }\cdot \mathbb{<span\; word-length="1"\; class="word\; redacted">█</span>}+\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}+(\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}/\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}+\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>})\mathrm{\nabla }(\mathrm{\nabla }\cdot \mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>})}$

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

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

███ ${\displaystyle \mathbb{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ███ ██████ ██████.

████ ████ ███████ ████ ████ █████ ██████ ███████ - ███████ ███████ █████ ${\displaystyle \mathrm{\nabla }\cdot \mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}=\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$, ███ ██ ${\displaystyle \mathbb{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ███ ████ ██████ ${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$. ███, ██████

${\displaystyle \mathrm{\nabla }\cdot \mathbb{<span\; word-length="1"\; class="word\; redacted">█</span>}=\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}{\mathrm{\nabla }}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}$

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

${\displaystyle \stackrel{\text{<span word-length="7" class="word redacted">███████</span>}}{\overbrace{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}(\underset{\begin{array}{c}\text{<span word-length="8" class="word redacted">████████</span>}\\ \text{<span word-length="12" class="word redacted">████████████</span>}\end{array}}{\underbrace{\frac{\mathrm{\partial }\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}{\mathrm{\partial }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}}+\underset{\begin{array}{c}\text{<span word-length="10" class="word redacted">██████████</span>}\\ \text{<span word-length="12" class="word redacted">████████████</span>}\end{array}}{\underbrace{\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}\cdot \mathrm{\nabla }\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}})}}=\underset{\begin{array}{c}\text{<span word-length="8" class="word redacted">████████</span>}\\ \text{<span word-length="8" class="word redacted">████████</span>}\end{array}}{\underbrace{-\mathrm{\nabla }\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}}+\underset{\text{<span word-length="9" class="word redacted">█████████</span>}}{\underbrace{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}{\mathrm{\nabla }}^{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}}+\underset{\begin{array}{c}\text{<span word-length="5" class="word redacted">█████</span>}\\ \text{<span word-length="6" class="word redacted">██████</span>}\end{array}}{\underbrace{\mathbf{<span\; word-length="1"\; class="word\; redacted">█</span>}}}}$