(std maths) has a reference page, and Part III a section on it

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_03.Standard-library.sz

@@ -7,6 +7,11 @@ A short tour of the standard library. Each module's full reference is its own pa
 The prelude is what every module has without importing anything: the collections and their functions, strings and characters, files and ports, Concurrent ML and scopes, and the macros the language is written with, such as @code{cond}, @code{if-let} and @code{type/derive}. Its reference also covers the builtins, the functions compiled into the runtime rather than written in Bjolang, since every program gets them with the prelude. At the REPL, @code{:show name} prints the same documentation.
 For more details, see @link["modules/std/prelude.html"]{@code{(std prelude)}}.
 
+@subsection{std/maths}
+
+Numbers beyond the operators. Integer division has Racket's names: @code{quotient} and @code{remainder} are what @code{/} and @code{%} do, and @code{modulo} takes the sign of the divisor, so @code{(modulo -1 10)} is 9. There are @code{gcd}, @code{lcm}, an integer @code{expt} and an exact @code{integer-sqrt} at every integer type, the @code{exact-} roundings from a double to an int, and the rest of @code{System.Math} over doubles. The prelude has @code{abs}, @code{min}, @code{max} and @code{clamp} from here without an import.
+For more details, see @link["modules/std/maths.html"]{@code{(std maths)}}.
+
 @subsection{std/fmt}
 
 Formatting in Bjolang is divided into two layers: interpolation and layout. 

modules/std/maths.sz

@@ -0,0 +1,3 @@
+(meta (title "(std maths)"))
+
+@generate-docs[#:module "std maths"]