Contents

• Chapter 1  Introduction
  • 1.1  Conventions
  • 1.2  Software and Documentation
• Chapter 2  Installation
  • 2.0.1  Configure script
• Chapter 3  The Gory Details
  • 3.1  Programs
  • 3.2  List of reserved words
  • 3.3  Building a mesh
    • 3.3.1  Triangulations
    • 3.3.2  Border(), buildmesh(), polygon()
    • 3.3.3  Geometric variables, inner and region bdy, normal
    • 3.3.4  Regions
  • 3.4  Functions
    • 3.4.1  Functions and scalars
    • 3.4.2  Building functions
    • 3.4.3  Value of a function at one point
    • 3.4.4  Special functions:dx(), dy(), convect()
  • 3.5  Global operators
  • 3.6  Integrals
  • 3.7  Solving an equation
    • 3.7.1  Onbdy()
    • 3.7.2  Pde()
    • 3.7.3  Solve()
    • 3.7.4  2-Systems
    • 3.7.5  Boundary conditions at corners
    • 3.7.6  Weak formulation
  • 3.8  Results
    • 3.8.1  plot, savemesh, save, load, loadmesh
    • 3.8.2  Saveall()
  • 3.9  Other features
    • 3.9.1  Iter
    • 3.9.2  Complex numbers
    • 3.9.3  Scal()
    • 3.9.4  Wait, nowait, changewait
    • 3.9.5  One Dimensional Plots
    • 3.9.6  Precise
    • 3.9.7  Exec(), user(), how to link an external function to Gfem
  • 3.10  Language internals
• Chapter 4  Examples
  • 4.1  Triangulations examples
  • 4.2  Scalar examples
  • 4.3  Complex number example
  • 4.4  2-system example
• Chapter 5  GNU Free Documentation License
  • 5.1  Applicability and Definitions
  • 5.2  Verbatim Copying
  • 5.3  Copying in Quantity
  • 5.4  Modifications
  • 5.5  Combining Documents
  • 5.6  Collections of Documents
  • 5.7  Aggregation With Independent Works
  • 5.8  Translation
  • 5.9  Termination
  • 5.10  Future Revisions of This License