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Global variables

area#

Area of the current triangle.

1 2	fespace Vh0(Th, P0); Vh0 A = area;

ARGV#

Array that contains all the command line arguments.

1 2	for (int i = 0; i < ARGV.n; i++) cout << ARGV[i] << endl;

See Command line arguments example for a complete example.

BoundaryEdge#

Return 1 if the current edge is on a boundary, 0 otherwise.

1	real B = int2d(Th)(BoundaryEdge);

CG#

Conjugate gradient solver.

Usable in problem and solve definition
1
problem Laplacian (U, V, solver=CG) = ...
Or in matrix construction
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matrix A = vLaplacian(Uh, Uh, solver=CG);
Or in set function
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set(A, solver=CG);

Cholesky#

Cholesky solver.

Crout#

Crout solver.

edgeOrientation#

Sign of $i-j$ if the current edge is $[q_i, q_j]$ .

1	real S = int1d(Th, 1)(edgeOrientation);

false#

False boolean value.

1	bool b = false;

GMRES#

GMRES solver (Generalized minimal residual method).

hTriangle#

Size of the current triangle.

1 2	fespace Vh(Th, P0); Vh h = hTriangle;

include#

Include an external library.

1	include "iovtk"

InternalEdge#

Return 0 if the current edge is on a boundary, 1 otherwise.

1	real I = int2d(Th)(InternalEdge);

label#

Label number of a boundary if the current point is on a boundary, 0 otherwise.

1	int L = Th(xB, yB).label;

lenEdge#

Length of the current edge.

For an edge $[q_i, g_j]$ , return $|q_i-q_j|$ .

1	real L = int1d(Th, 1)(lenEdge);

load#

Load a script.

1	load "Element_P3"

LU#

LU solver.

N#

Outward unit normal at the current point if it is on a curve defined by a border. N.x, N.y, N.z are respectively the $x$ , $y$ and $z$ components of the normal.

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func Nx = N.x;
func Ny = N.y;
func Nz = N.z;

nTonEdge#

Number of adjacent triangles of the current edge.

1	real nTE = int2d(Th)(nTonEdge);

nuEdge#

Index of the current edge in the triangle.

1	real nE = int2d(Th)(nuEdge);

nuTriangle#

Index of the current triangle.

1 2	fespace Vh(Th, P0); Vh n = nuTriangle;

P#

Current point.

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real cx = P.x;
real cy = P.y;
real cz = P.z;

pi#

Pi = 3.14159.

1	real Pi = pi;

This is a real value.

region#

Region number of the current point. If the point is outside, then region == notaregion where notaregion is a FreeFem++ integer constant.

1	int R = Th(xR, yR).region;

sparsesolver#

Sparse matrix solver.

true#

True boolean value.

1	bool b = true;

verbosity#

Verbosity level.

1 2	int Verbosity = verbosity; verbosity = 0;

0 = nothing, 1 = little information, 10 = a lot of information, ...

This is an integer value.

version#

FreeFem++ version.

1	cout << version << endl;

volume#

Volume of the current tetrahedra.

1 2	fespace Vh0(Th, P0); Vh0 V = volume;

x#

The $x$ coordinate at the current point.

1	real CurrentX = x;

This is a real value.

y#

The $y$ coordinate at the current point.

1	real CurrentY = y;

This is a real value.

z#

The $z$ coordinate at the current point.

1	real CurrentZ = z;

This is a real value.