Welcome to pyiga’s documentation!

• User Guide
  • Geometry manipulation in pyiga
  • Assembling custom forms
    • Assembling variational forms from their textual description
    • Programmatically defining VForms
    • A simple example
    • Vector-valued problems
    • Working with coefficient functions
    • Defining constant values
    • Defining linear (unary) forms
    • Working with parametric derivatives
    • Surface integrals
    • Supported functions
    • Compiling and assembling
• API Reference
  • B-splines
    • BSplineFunc
    • KnotVector
    • PhysicalGradientFunc
    • active_ev()
    • collocation()
    • collocation_derivs()
    • collocation_derivs_info()
    • collocation_info()
    • deriv()
    • ev()
    • interpolate()
    • knot_insertion()
    • load_vector()
    • make_knots()
    • numdofs()
    • project_L2()
    • prolongation()
    • single_ev()
    • tp_bsp_eval_pointwise()
    • tp_bsp_eval_with_jac_pointwise()
    • tp_bsp_jac_pointwise()
  • Geometry
    • NurbsFunc
    • UserFunction
    • bspline_quarter_annulus()
    • circle()
    • circular_arc()
    • circular_arc_3pt()
    • circular_arc_5pt()
    • circular_arc_7pt()
    • disk()
    • identity()
    • line_segment()
    • outer_product()
    • outer_sum()
    • perturbed_square()
    • quarter_annulus()
    • semicircle()
    • tensor_product()
    • twisted_box()
    • unit_cube()
    • unit_square()
  • Approximation
    • interpolate()
    • project_L2()
  • Assembling
    • Assembling general problems
    • Tensor product Gauss quadrature assemblers
    • Fast low-rank assemblers
    • Right-hand sides
    • Boundary and initial conditions
    • Multipatch problems
    • Integration
  • Hierarchical
    • Hierarchical spline spaces
    • Discretization
  • Operators
    • BaseBlockOperator
    • BlockDiagonalOperator()
    • BlockOperator()
    • DiagonalOperator
    • IdentityOperator
    • KroneckerOperator
    • NullOperator
    • PardisoSolverWrapper
    • SubspaceOperator
    • make_kronecker_solver()
    • make_solver()
  • Tensors
    • Module members
    • CanonicalOperator
    • CanonicalTensor
    • TensorProd
    • TensorSum
    • TuckerTensor
    • als()
    • als1()
    • als1_ls()
    • als1_ls_structured()
    • apply_tprod()
    • array_outer()
    • asarray()
    • find_truncation_rank()
    • fro_norm()
    • grou()
    • gta()
    • gta_ls()
    • hosvd()
    • join_tucker_bases()
    • matricize()
    • modek_tprod()
    • outer()
    • pad()
  • Solvers
    • GaussSeidelSmoother()
    • NoConvergenceError
    • OperatorSmoother()
    • SequentialSmoother()
    • crank_nicolson()
    • dirk34()
    • esdirk23()
    • esdirk34()
    • fastdiag_solver()
    • gauss_seidel()
    • iterative_solve()
    • newton()
    • rodasp()
    • ros3p()
    • ros3pw()
    • rosi2p1()
    • rowdaind2()
    • sdirk21()
    • sdirk3()
    • sdirk3_b()
    • solve_hmultigrid()
    • twogrid()
  • Visualization
    • animate_field()
    • plot_active_cells()
    • plot_curve()
    • plot_field()
    • plot_geo()
    • plot_hierarchical_cells()
    • plot_hierarchical_mesh()
  • Variational forms
    • BuiltinFuncExpr
    • ConstExpr
    • Dx()
    • Expr
    • GaussWeightExpr
    • InputField
    • LiteralMatrixExpr
    • LiteralVectorExpr
    • MatMatExpr
    • MatVecExpr
    • NegExpr
    • OuterProdExpr
    • Parameter
    • PartialDerivExpr
    • ScalarOperExpr
    • Scope
    • SurfaceMeasureExpr
    • TensorOperExpr
    • VForm
    • VarRefExpr
    • VectorCrossExpr
    • VolumeMeasureExpr
    • as_expr()
    • as_matrix()
    • as_vector()
    • cos()
    • cross()
    • curl()
    • det()
    • div()
    • dot()
    • ds
    • dx
    • exp()
    • grad()
    • hess()
    • inner()
    • inv()
    • iterexprs()
    • log()
    • make_var_expr()
    • mapexprs()
    • norm()
    • outer()
    • sin()
    • sqrt()
    • sym_index_to_seq()
    • tan()
    • tr()

Indices and tables

• Index

• Module Index

• Search Page