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#!F-adobe-helvetica-medium-r-normal--18*
#!N 
#!N  #!Rtall527 Matrices #!N #!N #!N Matrices are 2-dimensional 
collections of scalars. They are used to represent, among other things, 
the coefficients of a set of simultaneous equations or a transformation 
of a vector. #!N #!N Matrices are constructed from a sequence 
of vectors enclosed by square brackets. Each of the vectors contained 
in a matrix must have the same length as all of 
the others. The following are all valid matrices: #!CForestGreen #!N #!N 
 #!F-adobe-courier-bold-r-normal--18*   #!N #!N [[1 0 0 0][0 1 0 0][0 0 
1 0][0 0 0 1]] // a 4x4 identity matrix #!N 
#!N [[ 0.707 0.707 0.000] // a 45-degree rotation #!N [-0.707 
0.707 0.000] // about the Z axis #!N [ 0.000 0.000 
1.000]] #!N #!N [[1 1 1 1][2 2 2 2]] // 
a 2x4 matrix #!EF #!N #!N #!EC #!N #!N #!N  #!F-adobe-times-medium-i-normal--18*   
Next Topic #!EF #!N #!N  #!Ltall529,dxall529 h Tensors  #!EL  #!N  #!F-adobe-times-medium-i-normal--18*   #!N