I cannot understand how the parts of this proof circled in red are obtained.
2026-03-26 06:25:33.1774506333
Understanding the following expression in an integration
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This is an inequality, which stems from the fact that the function $y\mapsto|x-y|^{-t}\mathbf 1_{|x-y|\gt1}$ is uniformly bounded by $1$ hence its integral is at most $\mu(\mathbb R^n)$.
This is an equality, which stems from the fact that $\mu$ is the restriction of $\mathcal H^s$ to $E\subseteq F$.