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-
- (*********************************************************************
-
- Adapted from
- Roman E. Maeder: Programming in Mathematica,
- Second Edition, Addison-Wesley, 1991.
-
- *********************************************************************)
-
-
- BeginPackage["VectorCalculus`"]
-
- Div::usage = "Div[v, varlist] computes the divergence of
- the vectorfield v w.r.t. the given variables in Cartesian coordinates."
-
- Grad::usage = "Grad[s, varlist] computes the gradient of s
- w.r.t. the given variables in Cartesian coordinates."
-
- Laplacian::usage = "Laplacian[s, varlist] computes the Laplacian of
- the scalar field s w.r.t. the given variables in Cartesian coordinates."
-
- JacobianMatrix::usage = "JacobianMatrix[flist, varlist] computes the Jacobian of
- the functions flist w.r.t. the given variables."
-
- Begin["`Private`"]
-
- Div[v_List, var_List] := Inner[ D, v, var, Plus ]
-
- Grad[s_, var_List] := D[s, #]& /@ var
-
- Laplacian[s_, var_List] := Div[ Grad[s, var], var ]
-
- JacobianMatrix[f_List, var_List] := Outer[ D, f, var ]
-
- End[ ]
-
- Protect[ Div, Laplacian, Grad, JacobianMatrix ]
-
- EndPackage[ ]
-