Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

▼Nlf
▼Nassemble	D.o.f. index mapping and assembly facilities
CCOOMatrix	A temporary data structure for matrix in COO format
CDofHandler	A general (interface) class for DOF handling, see Lecture Document Paragraph 2.7.4.13
CDynamicFEDofHandler	Dof handler allowing variable local dof layouts
CEntityMatrixProviderAT	Archetype for the EntityMatrixProvider concept
CEntityVectorProviderAT	Archetype for the EntityVectorProvider concept
CUniformFEDofHandler	Dofhandler for uniform finite element spaces
▼Nbase	Contains basic functionality that is used by other parts of LehrFEM++
CAutoTimer	Measures execution time between construction and destruction. AutoTimer can output either to a `std::ostream` or to a `spdlog::logger`
CInvalidTypeException	Thrown to signal that an argument passed to a function had the wrong (polymorphic) type
CIsScalar	Base Traits class which can be used to determine if a type `T` is a scalar value
CIsScalar< std::complex< T >, std::enable_if_t< std::is_arithmetic_v< T > > >	Also `std::complex` is a "scalar" type if the underlying type is a `std::is_arithmetic` type
CIsScalar< T, std::enable_if_t< std::is_arithmetic_v< T > > >	Any type that is a `std::is_arithmetic` is also a scalar type
CLehrFemInfo	Provides extra information about this version of LehrFEM++, in particular licensing information
CLfException	A simple, general purpose exception class that is thrown by LehrFEM++ if something is wrong
CLineFeedFormatter	A spdlog formatter which wraps another formatter and makes sure that if there are new lines (`\n`) in the log message, that the log message is still properly indented
CPredicateTrue	A Function Object that can be invoked with any arguments and that always returns the value true
CRefEl	Represents a reference element with all its properties
►CTimer	Timer class to measure time
Ccpu_times	Packages the elapsed wall clock time, user process CPU time, and system process CPU time
▼Nfe	Collects data structures and algorithms designed for scalar finite element methods primarily meant for second-order elliptic boundary value problems
►Ntest_utils	Includes utilities to test classes from lf::fe
CComplexScalarReferenceFiniteElement	Wraps another ScalarReferenceFiniteElement and multiplies the shape functions with the imaginary unit to create complex valued shape functions
CDiffusionElementMatrixProvider	Class for computing element matrices for general scalar-valued finite elements and homogeneous 2nd-order elliptic bilinear forms
CFeHierarchicQuad	Hierarchic Finite Elements of arbitrary degree on quadrilaterals
CFeHierarchicSegment	Hierarchic Finite Elements of arbitrary degree on segments
CFeHierarchicTria	Hierarchic Finite Elements of arbitrary degree on triangles
CFePoint	Finite element on a point
CHierarchicScalarFESpace	Finite Element Space that supports arbitrary, local degrees
CMassEdgeMatrixProvider	Quadrature-based computation of local mass matrix for an edge
CMassElementMatrixProvider	Class for local quadrature based computation of element matrix for Lagrangian finite elements and a weighted \(L^2\) inner product
CMeshFunctionFE	A MeshFunction representing an element from a ScalarFESpace (e.g. solution of BVP)
CMeshFunctionGradFE	A MeshFunction representing the gradient of a function from a scalar finite element space (e.g. gradient of a solution of BVP)
CScalarFESpace	Space of scalar valued finite element functions on a Mesh
CScalarLoadEdgeVectorProvider	Local edge contributions to element vector
CScalarLoadElementVectorProvider	Local computation of general element (load) vector for scalar finite elements; volume contributions only
CScalarReferenceFiniteElement	Interface class for parametric scalar valued finite elements
▼Ngeometry	Defines the Geometry interface and provides a number of classes that implement this interface + additional geometry related helper routines
CGeometry	Interface class for shape information on a mesh cell in the spirit of parametric finite element methods
CParallelogram	Affine quadrilateral = parallelogram
CPoint
CQuadO1	Bilinear quadrilateral element shape
CQuadO2	A second-order quadrilateral in the plane or in 3D space
CRefinementPattern	Abstract interface class for encoding topological local refinement
CSegmentO1	A straight edge defined by the location of its two endpoints
CSegmentO2	A second-order segment in the plane or in 3D space
CTriaO1	An affine triangle in the plane or in 3D space
CTriaO2	A second-order triangle in the plane or in 3D space
▼Nio	Mesh input (from file) and output (in various formats) facilities
►CGMshFileV2	A representation of a .msh file (V2) in a c++ data structure
CElement	Represents a mesh volume/surface/line/point
CPeriodicEntity	Describes how 2 elementary entities are identified with each to represent periodic boundaries
CPhysicalEntity	Represents a physical entity as defined in gmsh. In GMSH a Physical entity is created through one of the commands `Physical Point`, `Physical Line`, `Physical Surface` or `Physical Volume` and represents a collection of points, lines, surfaces or volumes
►CGMshFileV4	A representation of a .msh file (V4) in a c++ data structure
CElementBlock	Represents number of mesh elements (such as triangles/quadrilaterals/points/lines) that share the same properties
CElements
CEntity	A higher-dimensional entity (which is not a point) such as a curve, surface or volume. It usually corresponds to an entity as it is created in a *.geo file. Every such entity consists of nodes and elements and is bounded by lower-dimensional entities
CGhostElement
CGhostEntity
CNodeBlock
CNodes
CPartitionedEntities
CPartitionedEntity	A higher dimensional partitioned entity
CPartitionedPointEntity	When a mesh is partitioned, the entities are also partitioned. This is a node entity which is typically used to describe other partitioned entities (as bounding entities)
CPeriodicLink	Describes how 2 elementary entities are identified with each other to represent periodic boundaries
CPhysicalName	Represents a physical name as defined in gmsh. In GMSH a Physical name is created through one of the commands `Physical Point`, `Physical Line`, `Physical Surface` or `Physical Volume` and represents a collection of points, lines, surfaces or volumes
CPointEntity	An entity of dimension 0. Usually an entity corresponds to a geometric construct as it is defined in the original *.geo file. Every entity consists of one or more elements and nodes. And every entity can belong to some physical tags
CGmshReader	Reads a Gmsh `*.msh` file into a mesh::MeshFactory and provides a link between mesh::Entity objects and the gmsh's physical entities
►CVtkFile	Representation of a VTK file (only relevant) features (advanced usage)
CFieldDataArray
CScalarData	Represents one set of attribute data (can be attached to points or cells)
CUnstructuredGrid
CVectorData
CVtkWriter	Write a mesh along with mesh data into a vtk file
▼Nmesh	Defines a set of interface classes that define a mesh manager and provides mesh-related tools that build on these interfaces
►Nhybrid2d	A namespace for managing 2D hybrid meshes using pointers to store sub-entity relations
CMesh	Basis 2D mesh type compliant with abstract mesh interface
CMeshFactory	Implements mesh::MeshFactory interface and can be used to construct a hybrid mesh with `dimMesh=2`
CPoint	A node object for a 2D hybrid mesh
CQuadrilateral	Describes a general quadrilateral cell for a 2D hybrid mesh
CSegment	An edge object for a 2D hybrid mesh
CTriangle	Describes a trilateral cell for a 2D hybrid mesh
►Nutils	Contains helper functions and classes that all operate on the interface classes defined in lf::mesh
CAllCodimMeshDataSet	Assigns to every entity (all codims) in a mesh a value of type `T`
CCodimMeshDataSet	A MeshDataSet that attaches data of type `T` to every entity of a mesh that has a specified codimension
CMeshDataSet	Interface that specifies how data is stored with an entity
CMeshFunctionAT	Archetype for the MeshFunction concept
CMeshFunctionBinary	A MeshFunction which combines two other mesh functions using a binary operator (advanced use)
CMeshFunctionConstant	A MeshFunction which takes the same constant value on the whole mesh
CMeshFunctionGlobal	MeshFunction wrapper for a simple function of physical coordinates
CMeshFunctionUnary	A mesh function representing another mesh function under a pointwise, unary operation
CStructuredMeshBuilder	Builder interface for creating structured meshes on rectangular domains
CTorusMeshBuilder	Implements a MeshBuilder for a tensor product grid of a torus
CTPQuadMeshBuilder	Implements a Builder for a tensor product grid (with rectangular cells)
CTPTriagMeshBuilder	Implements a `MeshBuilder` that generates a triangular structured mesh
CEntity	Interface class representing a topological entity in a cellular complex
CMesh	Abstract interface for objects representing a single mesh
CMeshFactory	Interface class for initialization of a mesh object
▼Nquad	Rules for numerical quadrature on reference entity shapes
CQuadRule	Represents a Quadrature Rule over one of the Reference Elements
CQuadRuleCache	A cache for make_QuadRule()
▼Nrefinement	Tools for regular or local refinement of 2D hybrid meshes
CCellChildInfo	Information about the refinement status of a cell
CEdgeChildInfo	Information about the refinement status of an edge
CEntityCenterPositionSelector	Utility class: selection of entities according to the position of their midpoint
CHybrid2DRefinementPattern	Class containing information about the refinement of a cell
CMeshFunctionTransfer	A MeshFunction representing interpolation on a lf::refinement::MeshHierarchy
CMeshHierarchy	A hierarchy of nested 2D hybrid meshes created by refinement
CParentInfo	Information about possible parent entities
CPointChildInfo	Information about the refinement status of a point
▼Nuscalfe	Collects data structures and algorithms designed for scalar finite element methods primarily meant for second-order elliptic boundary value problems
CFeLagrangeO1Quad	Linear Lagrange finite element on the quadrilateral reference element
CFeLagrangeO1Segment	Linear Lagrange finite element on a line segment
CFeLagrangeO1Tria	Linear Lagrange finite element on triangular reference element
CFeLagrangeO2Quad	Quadratic Lagrangian finite element on a quadrilateral reference element
CFeLagrangeO2Segment	Quadratic Lagrangian finite element on a line segment
CFeLagrangeO2Tria	Quadratic Lagrangian finite element on a triangular reference element
CFeLagrangeO3Quad	Cubic Lagrangian finite element on a quadrilateral reference element
CFeLagrangeO3Segment	Cubic Lagrangian finite element on a line segment
CFeLagrangeO3Tria	Cubic Lagrangian finite elment on a triangular reference element
CFeSpaceLagrangeO1	(Bi)Linear Lagrangian Finite Element space
CFeSpaceLagrangeO2	Quadratic Lagrangian Finite Element space
CFeSpaceLagrangeO3	Cubic Lagrangian Finite Element space
CLinearFELaplaceElementMatrix	Computing the element matrix for the (negative) Laplacian and linear finite elements
CLinearFELocalLoadVector	Class for computation of local load vector for linear finite elements
CMassEdgeMatrixProvider	Quadrature-based computation of local mass matrix for an edge
CPrecomputedScalarReferenceFiniteElement	Helper class which stores a ScalarReferenceFiniteElement with precomputed values at the nodes of a quadrature rule
CReactionDiffusionElementMatrixProvider	Class for local quadrature based computations for Lagrangian finite elements and second-order scalar elliptic BVPs
CScalarLoadEdgeVectorProvider	Local edge contributions to element vector
CScalarLoadElementVectorProvider	Local computation of general element (load) vector for scalar finite elements; volume contributions only
CUniformScalarFESpace	Space of scalar valued finite element functions on a hybrid 2D mesh
CVariantVisitor