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<tt>edge</tt>

reference element

# Description

The edge `reference_element` is `K = [0,1]`.

        0---------1
             x

This one-dimensional `reference_element` is then transformed, after the Piola geometrical application, as a segment in a 1D, 2D or 3D physical space, as a `geo_element`.

Curved high order transformed `geo_element` Pk edges (k >= 1) are supported for 2D or 3D geometries. In these cases, the nodes of an high-order edge are numbered as:

      0----2----1     0--2--3--1    0-2-3-4-1
          P2              P3           P4

It means that boundary nodes come first, and then are the internal nodes.

# Implementation

This documentation has been generated from file fem/geo_element/edge.icc

const size_t dimension = 1;
const Float measure = 1;
const size_t n_vertex = 2;
const point vertex [n_vertex] = {
point(0),
point(1) };
Float
see the Float page for the full documentation
point
see the point page for the full documentation
dimension
const size_t dimension
Definition edge.icc:64
vertex
const point vertex[n_vertex]
Definition edge.icc:67
n_vertex
const size_t n_vertex
Definition edge.icc:66
measure
const Float measure
Definition edge.icc:65