Remove an unused import

[linpy.git] / doc / reference.rst

diff --git a/doc/reference.rst b/doc/reference.rst
index e649227..ae82aca 100644 (file)
--- a/doc/reference.rst
+++ b/doc/reference.rst
@@ -1,8 +1,12 @@
 
+.. _reference:
+
 Module Reference
 ================
 
 
+.. _reference_symbols:
+
 Symbols
 -------
 
@@ -68,6 +72,8 @@ This is achieved using ``Dummy('x')``.
     True
 
 
+.. _reference_linexprs:
+
 Linear Expressions
 ------------------
 
@@ -173,7 +179,6 @@ For example, if ``x`` is a :class:`Symbol`, then ``x + 1`` is an instance of :cl
         >>> x < y
         Le(x - y + 1, 0)
 
-
     .. method:: scaleint()
 
         Return the expression multiplied by its lowest common denominator to make all values integer.
@@ -229,6 +234,8 @@ They are implemented by the :class:`Rational` class, that inherits from both :cl
     See the documentation of :class:`fractions.Fraction` for more information and examples.
 
 
+.. _reference_polyhedra:
+
 Polyhedra
 ---------
 
@@ -303,11 +310,14 @@ This space can be unbounded.
 
     The universe polyhedron, whose set of constraints is always satisfiable, i.e. is empty.
 
+
+.. _reference_domains:
+
 Domains
 -------
 
 A *domain* is a union of polyhedra.
-Unlike polyhedra, domains allow exact computation of union and complementary operations.
+Unlike polyhedra, domains allow exact computation of union, subtraction and complementary operations.
 
 .. class:: Domain(*polyhedra)
               Domain(string)
@@ -485,6 +495,8 @@ Unlike polyhedra, domains allow exact computation of union and complementary ope
         Convert the domain to a sympy expression.
 
 
+.. _reference_operators:
+
 Comparison and Logic Operators
 ------------------------------
 
@@ -530,6 +542,8 @@ The following functions combine :class:`Polyhedron` or :class:`Domain` instances
     Create the complementary domain of the domain given in argument.
 
 
+.. _reference_geometry:
+
 Geometric Objects
 -----------------