Re: A notation convenience for certain nonlinear expressions
 From: MokKong Shen <mokkong.shen@xxxxxxxxxxx>
 Date: Tue, 01 Jun 2010 15:18:01 +0200
MokKong Shen wrote:
If f11(x) etc. are functions of x, one can namely e.g. use
 f11 f12   x1 
  *  
 f21 f22   x2 
to express the vector
 f11(x1) + f12(x2) 
 
 f21(x1) + f22(x2) 
[Addendum] One could evidently, if desired, also adopt the convention
that in the vector above + be substituted by xor, while leaving the
functions unchanged. On the symbolic level, one could write/discuss
M1*M2, M^(1), C = M * P, etc., as is familiar in linear algebra.
M. K. Shen
.
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