In Yop models are represented using the class `YopSystem`

. A typical system is an ordinary differential equation (ODE), but semi-explicit algebraic differential equations (DAEs) of differential index 1 are supported.

### Declaration

How to declare how `YopSystems`

are found the systems page.

#### Links

### Connections

How to connect systems using `YopConnection`

is found on the connections page.

### Modeling limitations

Modeling limitations due to the symbolic representation of models are found on the limitations page.

### Independent variables

How the independent variable is treated for `YopSystem`

s are found on the independent variable page.