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Question: Is there a way to denote the n-th derivatives of u with respect to x as u_{nx}?

Question:Is there a way to denote the n-th derivatives of u with respect to x as u_{nx}?

yihezhi 15
December 30 2013
0

In his article “Subscripts as Partial Differentiation Operatuuors” , rlopez 1228 showed us a way to denote partial derivatives by repeat subscripts. For example, the sixth derivative of u(x,y) with respect to x will be denoted by u_{x,x,x,x,x,x}.

 

Is there a way to make the notation u_{x,x,x,x,x,x} even shorter by u_{6x}?

 

In the same way mixed derivatives u_{x,x,x,y,y,y,y} will be denoted as u_{3x,4y}, etc.

 

Thank you very much!
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