$A\subset \mathbb{R}^n$ and should not depend on $i$ and $j$.
2026-03-30 05:13:52.1774847632
Does there exist a family of functions $(g_i)$ such that $\int_A g_i(x)g_j(x)dx=0 \Leftrightarrow i\nmid j \land j\nmid i$
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