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# PDE Problem Setup Basics

Set up problems using the PDE Modeler app or command line functions

The first step in setting up a PDE problem is to create a PDE model container for the equation or system that you are going to solve. The parameters of your partial differential equation or system, such as number of equations, geometry, equation coefficients, boundary and initial conditions, mesh, and so on, will be stored as properties of the PDE model.

When using the PDE Modeler app, the first step is to open the app by typing the `pdeModeler` command.

## Functions

 `createpde` Create model

## Classes

 `PDEModel` PDE model object

## Apps

 PDE Modeler Solve partial differential equations in 2-D regions

## Topics

### Programmatic Workflow

Solve Problems Using PDEModel Objects

Steps to follow when solving PDE problems from the command line.

### PDE Modeler App Workflow

Open the PDE Modeler App

Open the app for interactive PDEs solving.

Solve 2-D PDEs Using the PDE Modeler App

Model, solve, and analyze PDEs interactively.

### Algorithms and Other Theory

Equations You Can Solve Using PDE Toolbox

Partial Differential Equation Toolbox™ lets you model and solve particular types of scalar PDEs and systems of PDEs.

Put Equations in Divergence Form

Transform PDEs to the form required by Partial Differential Equation Toolbox.

Finite Element Method Basics

Description of the use of the finite element method to approximate a PDE solution using a piecewise linear function.

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