.\"
.de Id
..
.de Sp
.if n .sp
.if t .sp 0.4
..
.TH edge 7rheolef "rheolef-6.5" "rheolef-6.5" "rheolef-6.5"
.\" label: /*Class:edge
.SH NAME
\fBedge\fP - Edge reference element
.\" skip: @cindex edge
.\" skip: @cindex reference element
.SH DESCRIPTION

The edge reference element is K = [0,1].
.\" begin_example
.Sp
.nf
      0---------1   x
.Sp
.fi
.\" end_example
Curved high order Pk edges (k >= 1), in 2d or 3d geometries, are supported.
These edges have internal nodes, numbered as:
.\" begin_example
.Sp
.nf
      0----2----1     0--2--3--1    0-2-3-4-1
          P2              P3           P4
.Sp
.fi
.\" end_example
.\" skip start:DATE:
.\" skip start:AUTHOR:
.\" END
.SH IMPLEMENTATION
.\" begin_example
.Sp
.nf
const size_t dimension = 1;
const size_t measure = 1;
const size_t n_vertex = 2;
const point vertex [n_vertex] = {
        point(0),
        point(1) };
.Sp
.fi
.\" end_example