etian2

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These are questions asked by etian2

Hi, with Units[Simple] package loaded, I tried to differentiate a few functions using D[n] but it does not work. problem.mw

a := proc (x, y) options operator, arrow; exp(x*y) end proc

proc (x, y) options operator, arrow; exp(y*x) end proc

(1)

D[1](a)

proc (x, y) options operator, arrow; y*exp(y*x) end proc

(2)

D[2](a)

proc (x, y) options operator, arrow; x*exp(y*x) end proc

(3)

retart

retart

(4)

"with(Units[Simple]):"

a := proc (x, y) options operator, arrow; exp(x*y) end proc

proc (x, y) options operator, arrow; Units:-Simple:-exp(Units:-Simple:-`*`(x, y)) end proc

(5)

D[1](a)

Error, (in tools/gensym) too many levels of recursion

 

D[2](a)

Error, (in tools/gensym) too many levels of recursion

 

NULL

Download problem.mw

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I want to create a variable that is made up of a letter and an arrow on top. How to do that?

Also, how can I create a variable that is bold? I tried to type it as bold and then assign. But when I hit return it returns a normal symbol.

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