The typical class declaration of the classes in the base category is

  template <class T, unsigned D> 
  class A {
  ....
  };

where T denotes the data type (double/float/int) and D the physical dimension. The default T=double and D=3 for the libraries and applications. Many classes use partial specializations with D=3 for performance.

• PETE: Portable Expression Template Engine developed by LANL Advanced Computing Lab (included for convenience).

• OhmmsPETE: container classes and expression-template-capable operators generated by PETE library.

• OhmmsData: base classes to interface ohmms objects with text parsers.

• Utilities: utility classes and free functions, ascii parsers, generic physical concepts like species.

• Message: classes to handle parallelism.

• OOMPI: C++ class library for MPI parallel library (included for convenience).

• EigSolver: interfaces to numerical libraries, lapack, essl and arpack for eigen problems.

• Lattice: layout classes to handle supercells and spatial domains.

• ParticleBase: container for a particle set consisting of many particles.