Created the Abstract Algebra theorems and definitions cheat sheet

part-3/chapters/chapter-13/fields.tex

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+\section{Fields}
+
+\begin{definition}[Field]
+	A \textit{field} is a commutative ring with unity in which every nonzero element is a unit.
+\end{definition}
+
+\begin{theorem}[Finite Integral Domains are Fields]
+	A finite integral domain is a field.
+\end{theorem}
+
+\begin{corollary}[$\mathbf{\Z_p}$ Is a Field]
+	For every prime $p$, $\Z_p$, the ring of integers modulo $p$ is a field.
+\end{corollary}