███ ███████

███ ███████ ██ ███ ██████ ██ ███████ (███████: ███████'█ ███ ██ █████████) ███ ███ ███████ █████ ███████ ████ ██ ████ ██████ ███ ████ █████ ███ █████ ████, █████ ██████ ███ █████ (█████ ███ ██████-████ ██ ██"█) ██████ ██. ██ ████ ████ ████████ ██████ █████ ███████ (███████ ███████) █-████ ████ ██████, ██████ ██ ███████ █████ █████ ████████. ███ ██ ███ ███ ██ ███████ ██████ ███████ █████ ████ ██████████████.

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

██████ ██████ ██ ███ ███████ █████ ██ ██████ ███████ ██████ ███ █████ ███████ ██████:

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

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

████ ███ █████ ████ █████ █████, ████ ██████ ███ ████ ██████ █████ █████ ${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ████ █־${\displaystyle {\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}_{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}=\overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}\cdot \overrightarrow{\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}=|\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}||\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}|\mathrm{<span\; word-length="3"\; class="word\; redacted">███</span>}\mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ████ ${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ███ ██████ ███ █████ ████ ${\displaystyle \mathrm{<span\; word-length="1"\; class="word\; redacted">█</span>}}$ ███████ █████ █████.

███ █████ – ███ ███

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

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

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

████ ███"█ █████ █████ ███:

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