Here is a list of all documented namespaces with brief descriptions:

[detail level 1234]

▼Ndolfinx
▼Ncommon	Miscellaneous classes, functions and types
Nimpl
CIndexMap	This class represents the distribution index arrays across processes. An index array is a contiguous collection of N+1 indices [0, 1, . . ., N] that are distributed across M processes. On a given process, the IndexMap stores a portion of the index set using local indices [0, 1, . . . , n], and a map from the local indices to a unique global index
CScatterer	A Scatterer supports the MPI scattering and gathering of data that is associated with a common::IndexMap
CTimeLogger	Timer logging
CTimeLogManager	Logger initialisation
CTimer	A timer can be used for timing tasks. The basic usage is
▼Nfem	Finite element method functionality
Nimpl
Npetsc	Helper functions for assembly into PETSc data structures
Nsparsitybuild	Support for building sparsity patterns from degree-of-freedom maps
CDirichletBC	Object for setting (strong) Dirichlet boundary conditions
CForm	A representation of finite element variational forms
CConstant	Constant value which can be attached to a Form. Constants may be scalar (rank 0), vector (rank 1), or tensor-valued
CCoordinateElement	A CoordinateElement manages coordinate mappings for isoparametric cells
CDofMap	Degree-of-freedom map
CElementDofLayout	The class represents the degree-of-freedom (dofs) for an element. Dofs are associated with a mesh entity. This class also handles sub-space dofs, which are views into the parent dofs
CExpression	Represents a mathematical expression evaluated at a pre-defined set of points on the reference cell. This class closely follows the concept of a UFC Expression
CFiniteElement	Finite Element, containing the dof layout on a reference element, and various methods for evaluating and transforming the basis
CFunction	This class represents a function \( u_h \) in a finite element function space \( V_h \), given by
CFunctionSpace	This class represents a finite element function space defined by a mesh, a finite element, and a local-to-global map of the degrees of freedom (dofmap)
▼Ngeometry	Geometry data structures and algorithms
CBoundingBoxTree	Axis-Aligned bounding box binary tree. It is used to find entities in a collection (often a mesh::Mesh)
▼Ngraph	Graph data structures and algorithms
Nbuild	Tools for distributed graphs
Nkahip	Interfaces to KaHIP parallel partitioner
Nparmetis
Nscotch
CAdjacencyList	This class provides a static adjacency list data structure. It is commonly used to store directed graphs. For each node in the contiguous list of nodes [0, 1, 2, ..., n) it stores the connected nodes. The representation is strictly local, i.e. it is not parallel aware
▼Nio	Support for file IO
Ncells	Functions for the re-ordering of input mesh topology to the DOLFINx ordering, and transpose orderings for file output
Nxdmf_function	Low-level methods for reading/writing XDMF files
Nxdmf_mesh	Low-level methods for reading XDMF files
Nxdmf_meshtags
Nxdmf_read	Low-level methods for reading XDMF files
Nxdmf_utils
CADIOS2Writer	Base class for ADIOS2-based writers
CFidesWriter	Output of meshes and functions compatible with the Fides Paraview reader, see https://fides.readthedocs.io/en/latest/paraview/paraview.html
CVTXWriter	Writer for meshes and functions using the ADIOS2 VTX format, see https://adios2.readthedocs.io/en/latest/ecosystem/visualization.html#using-vtk-and-paraview
CHDF5Interface	This class provides an interface to some HDF5 functionality
CVTKFile	Output of meshes and functions in VTK/ParaView format. Isoparametric meshes of arbitrary degree are supported. For finite element functions, cell-based (DG0) and Lagrange (point-based) functions can be saved. For vertex-based functions the output must be isoparametic, i.e. the geometry and the finite element functions must be defined using the same basis
CXDMFFile	Read and write mesh::Mesh, fem::Function and other objects in XDMF
▼Nla	Linear algebra interface
Nimpl
▼Npetsc
Noptions	These class provides static functions that permit users to set and retrieve PETSc options via the PETSc option/parameter system. The option must not be prefixed by '-', e.g
CVector	A simple wrapper for a PETSc vector pointer (Vec). Its main purpose is to assist with memory/lifetime management of PETSc Vec objects
COperator	This class is a base class for matrices that can be used in petsc::KrylovSolver
CMatrix	It is a simple wrapper for a PETSc matrix pointer (Mat). Its main purpose is to assist memory management of PETSc Mat objects
CKrylovSolver	This class implements Krylov methods for linear systems of the form Ax = b. It is a wrapper for the Krylov solvers of PETSc
CMatrixCSR	Distributed sparse matrix
CSLEPcEigenSolver	This class provides an eigenvalue solver for PETSc matrices. It is a wrapper for the SLEPc eigenvalue solver
CSparsityPattern	This class provides a sparsity pattern data structure that can be used to initialize sparse matrices. After assembly, column indices are always sorted in increasing order. Ghost entries are kept after assembly
CVector	Distributed vector
Nmath
▼Nmesh	Mesh data structures and algorithms on meshes
CMeshTags	MeshTags associate values with mesh entities
CGeometry	Geometry stores the geometry imposed on a mesh
CMesh	A Mesh consists of a set of connected and numbered mesh topological entities, and geometry data
CTopology	Topology stores the topology of a mesh, consisting of mesh entities and connectivity (incidence relations for the mesh entities)
▼NMPI	MPI support functionality
CComm	A duplicate MPI communicator and manage lifetime of the communicator
Cdependent_false
▼Nnls	Nonlinear solvers
▼Npetsc
CNewtonSolver	This class defines a Newton solver for nonlinear systems of equations of the form \(F(x) = 0\)
▼Nrefinement	Mesh refinement algorithms
Nplaza	Function in this namespace implement the refinement method described in Plaza and Carey "Local refinement of simplicial grids based on the skeleton" (Applied Numerical Mathematics 32 (2000) 195-218)
CTable	This class provides storage and pretty-printing for tables. Example usage: