One of the review problems in my final review is the following:
Let $X\subset\mathbb P_{\mathbb C}^n$ be a hypersurface, and $P\in X$ a singular point. Let $L$ be a line not contained in $X$ that intersects $X$ at $P$.
Prove that $h_{X\cap L}(P)\geq2$, the intersection multiplicity of $X$ and $L$ at $P$, where $h_{X\cap L}(P)$ refers to the hilbert polynomial of $X\cap L$ at $P$.
From my readings, it doesn't seem like the hilbert polynomial accepts a point as input, but rather a natural number. So what does this even mean?
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