We all know that $C_c^{\infty}(\mathbb{R})$ is dense in $L^2(\mathbb{R})$. Now, is the space $\{f\in C_c^{\infty}(\mathbb{R}):f(a)=0\}$ (where $a\in\mathbb{R}$) still dense in $L^2(\mathbb{R})$?
Thanks a lot!
Math.
We all know that $C_c^{\infty}(\mathbb{R})$ is dense in $L^2(\mathbb{R})$. Now, is the space $\{f\in C_c^{\infty}(\mathbb{R}):f(a)=0\}$ (where $a\in\mathbb{R}$) still dense in $L^2(\mathbb{R})$?
Thanks a lot!
Math.
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