basix::polynomials Namespace Reference

Polynomials. More...

Enumerations
enum class	type { legendre = 0 , bernstein = 1 }
	Variants of a Lagrange space that can be created.

Functions
std::pair< std::vector< double >, std::array< std::size_t, 2 > >	tabulate (polynomials::type polytype, cell::type celltype, int d, std::experimental::mdspan< const double, std::experimental::dextents< std::size_t, 2 >> x)
	Tabulate a set of polynomials. More...
int	dim (polynomials::type polytype, cell::type cell, int d)
	Dimension of a polynomial space. More...

Detailed Description

Polynomials.

Function Documentation

dim()

int basix::polynomials::dim	(	polynomials::type	polytype,
		cell::type	cell,
		int	d
	)

Dimension of a polynomial space.

Parameters

[in]	polytype	The polynomial type
[in]	cell	The cell type
[in]	d	The polynomial degree

Returns

The number terms in the basis spanning a space of polynomial degree d

tabulate()

std::pair< std::vector< double >, std::array< std::size_t, 2 > > basix::polynomials::tabulate	(	polynomials::type	polytype,
		cell::type	celltype,
		int	d,
		std::experimental::mdspan< const double, std::experimental::dextents< std::size_t, 2 >>	x
	)

Tabulate a set of polynomials.

Parameters

[in]	polytype	Polynomial type
[in]	celltype	Cell type
[in]	d	Polynomial degree
[in]	x	Points at which to evaluate the basis. The shape is (number of points, geometric dimension).

Returns

Polynomial sets, for each derivative, tabulated at points. The shape is (basis index, number of points).