diff --git a/libs/numeric/odeint/doc/concepts.qbk b/libs/numeric/odeint/doc/concepts.qbk
index 5692e2f5..94dea316 100644
--- a/libs/numeric/odeint/doc/concepts.qbk
+++ b/libs/numeric/odeint/doc/concepts.qbk
@@ -1,5 +1,6 @@
[section Concepts]
+[include concepts/system.qbk]
[include concepts/stepper.qbk]
[include concepts/error_stepper.qbk]
[include concepts/controlled_stepper.qbk]
diff --git a/libs/numeric/odeint/doc/concepts/stepper.qbk b/libs/numeric/odeint/doc/concepts/stepper.qbk
index 94cbec68..bc0c37c2 100644
--- a/libs/numeric/odeint/doc/concepts/stepper.qbk
+++ b/libs/numeric/odeint/doc/concepts/stepper.qbk
@@ -37,7 +37,7 @@ tba.
* ''''''[*order_type]''''''
''''''`Stepper::order_type`''''''
-''''''The type characterizing the order of the ODE, typically something like `unsigned short`.''''''
+''''''The type characterizing the order of the ODE, typically `unsigned short`.''''''
[endsect]
@@ -59,7 +59,7 @@ tba.
[section Valid expressions]
[table
- [[Name] [Expression] [Type] [Semantics]]
+ [[Name] [Expression] [Returns] [Semantics]]
[[Get the order] [`stepper.order()`] [`Order`] [Returns the order of the stepper which is used for error calculation.] ]
[[Do step in-place] [`stepper.do_step( sys , x , t , dt )`] [`void`] [Performs one step of step size `dt`. The newly obtained state is written in place in `x`.] ]
[[Do step out-of-place] [`stepper.do_step( sys , in , t , out , dt )`] [`void`] [Performs one step. The newly obtained state is written to `out`] ]
diff --git a/libs/numeric/odeint/doc/concepts/system.qbk b/libs/numeric/odeint/doc/concepts/system.qbk
new file mode 100644
index 00000000..58609102
--- /dev/null
+++ b/libs/numeric/odeint/doc/concepts/system.qbk
@@ -0,0 +1,37 @@
+[section Concept system]
+
+Concept Sytem
+
+[section Description]
+
+The System concept models the algorithmic implementation of the rhs. of the ODE, that is ['f(x,t)].
+The only requirement for this concept is that it should be callable with a specific parameter syntax (see below).
+A System is typically implemented as a function or a functor.
+
+[endsect]
+
+[section Notation]
+
+[variablelist
+ [[State] [A type that is the `state_type` of Stepper]]
+ [[Deriv] [A type that is the `deriv_type` of Stepper]]
+ [[Time] [A type that is the `time_type` of Stepper]]
+ [[sys] [An object that models System]]
+ [[x] [Object of type State]]
+ [[dxdt] [Object of type Deriv]]
+ [[t] [Object of type Time]]
+]
+
+[endsect]
+
+[section Valid expressions]
+
+[table
+ [[Name] [Expression] [Returns] [Semantics]]
+ [[Calculate ['dx/dt := f(x,t)]] [`sys( x , dxdt , t )`] [`void`] [Calculates f(x,t), the result is stored into dxdt] ]
+]
+
+[endsect]
+
+
+[endsect]
\ No newline at end of file
diff --git a/libs/numeric/odeint/doc/html/boost_sandbox_numeric_odeint/concepts.html b/libs/numeric/odeint/doc/html/boost_sandbox_numeric_odeint/concepts.html
index 0894c9ad..bf65ed58 100644
--- a/libs/numeric/odeint/doc/html/boost_sandbox_numeric_odeint/concepts.html
+++ b/libs/numeric/odeint/doc/html/boost_sandbox_numeric_odeint/concepts.html
@@ -3,7 +3,7 @@
Concepts
-
+
@@ -13,9 +13,9 @@
+
