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+====================
+Algebra
+====================
+
+.. note:: Most of the definitions and notation in the section are based on [rudin]_ or [meserve]_
+
+.. list-table:: Closure of binary operators on given sets of numbers
+    * Operation
+     - :latex:`$+$`
+     - :latex:`$\times$`
+     - :latex:`$-$`
+     - :latex:`$\divide$`
+     - :latex:`$^$`
+     - :latex:`$\sqrt{\text{ }}$`
+    * Positive Integers
+     - Y
+     - Y
+     - N
+     - N
+     - Y
+     - N
+    * Positive rationals
+     - Y
+     - Y
+     - N
+     - Y
+     - Y
+     - N
+    * Rationals (and zero)
+     - Y
+     - Y
+     - Y
+     - Y
+     - Y
+     - N
+    * Reals wrt positive integers
+     - Y
+     - Y
+     - Y
+     - Y
+     - Y
+     - Y
+    * Complex numbers
+     - Y
+     - Y
+     - Y
+     - Y
+     - Y
+     - Y
+
+Definitions
+=============
+
+*involution*
+    to raise a number to a given power
+
+*evolution*
+    to take a given root of a number
+
+*associative*
+    :latex:`$(a+b)+c=a+(b+c)$`
+
+*comutative*
+    :latex:`$a+b=b+c$`
+
+*distributive*
+    :latex:`$(a+b)c=ac+bc$`
+
+.. [rudin] `Principles of Mathematical Analysis (3rd ed)`:title:, by Walter Rudin. McGraw-Hill, 1976
+
+.. [meserve] `Fundamental Concepts of Algebra`:title:, by Bruce Meserve.