Added subsections when they appear, added all of the appendices, and finished the packet
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A vector space is called \textbf{finite-dimensional} if it has a basis consisting of a finite number of vectors. The unique number of vectors in each basis for $V$ is called the \textbf{dimension} of $V$ and is denoted by $\text{dim}(V)$. A vector space that is not finite-dimensional is called \textbf{infinite-dimensional}.
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\end{definition}
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\begin{corollary}
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\begin{corollary}\label{Corollary 1.5}
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\hfill\\
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Let $V$ be a vector space with dimension $n$.
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\begin{enumerate}
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\end{enumerate}
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\end{corollary}
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\subsection*{The Dimension of Subspaces}
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\addcontentsline{toc}{subsection}{The Dimension of Subspaces}
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\begin{theorem}
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\hfill\\
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Let $W$ be a subspace of a finite-dimensional vector space $V$. Then $W$ is finite-dimensional and $\text{dim}(W) \leq \text{dim}(V)$. Moreover, if $\text{dim}(W) = \text{dim}(V)$, then $V = W$.
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If $W$ is a subspace of a finite-dimensional vector space $V$, then any basis for $W$ can be extended to a basis for $V$.
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\end{corollary}
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\subsection*{The Lagrange Interpolation Formula}
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\addcontentsline{toc}{subsection}{The Lagrange Interpolation Formula}
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\begin{definition}[\textbf{The Lagrange Interpolation Formula}]
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\hfill\\
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Corollary 2 of the replacement theorem can be applied to obtain a useful formula. Let $c_0, c_1, \dots, c_n$ be distinct scalars in an infinite field $\F$. The polynomials $f_0(x), f_1(x), \dots, f_n(x)$ defined by
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\autoref{Corollary 1.5} of the replacement theorem can be applied to obtain a useful formula. Let $c_0, c_1, \dots, c_n$ be distinct scalars in an infinite field $\F$. The polynomials $f_0(x), f_1(x), \dots, f_n(x)$ defined by
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\[f_i(x) = \frac{(x-c_0)\dots(x-c_{i-1})(x-c_{i+1})\dots(x-c_n)}{(c_i - c_0)\dots(c_i-c_{i-1})(c_i-c_{i+1})\dots(c_i-c_n)} = \prod_{\substack{k=0 \\ k \neq i}}^{n} \frac{x-c_k}{c_i - c_k}\]
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