RETRACTION: WRONG COVERING RATIO INEQUALITY.
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Bokuan Li
2026-10-02 22:54:54 -04:00
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@@ -57,9 +57,9 @@
\begin{lemma}
\label{lemma:haar-approx}
Let $G$ be a locally compact group, $f, f'\in C_c^+(G)$, and $\eps > 0$, then there exists $V \in \cn_G(1)$ such that for any $g \in C_c^+(V)$ with $g \ne 0$,
Let $G$ be a locally compact group, $f, f'\in C_c^+(G)$, $f_0 \in C_c^+(G) \setminus \bracsn{0}$, and $\eps > 0$, then there exists $V \in \cn_G(1)$ such that for any $g \in C_c^+(V)$ with $g \ne 0$,
\[
(f: g) + (f': g) \le (f + f': g) + \eps
\frac{(f: g)}{(f_0: g)} + \frac{(f': g)}{(f_0: g)} \le \frac{(f + f': g)}{(f_0: g)} + \eps
\]
\end{lemma}
\begin{proof}[Proof, {{\cite[Lemma 2.18]{FollandHarmonic}}}. ]
@@ -94,8 +94,11 @@
Since the above holds for all such $\seqf{c_j} \subset [0, \infty)$ and $\seqf{x_j} \subset G$,
\begin{align*}
(f: g) + (f': g) &\le (1 + 2\delta)(H: g) \\
&\le (1 + 2\delta)[(f + f': g) + \delta(\eta: g)]
&\le (1 + 2\delta)[(f + f': g) + \delta(\eta: g)] \\
\frac{(f: g)}{(f_0: g)} + \frac{(f': g)}{(f_0: g)} &\le (1 + 2\delta)[(f + f': f_0) + \delta(\eta: f_0)]
\end{align*}
by (5) of \autoref{proposition:covering-ratio-gymnastics}.
\end{proof}
\begin{theorem}[Haar]