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difforms

  

mixpar

  

ensure equality of mixed partial derivatives

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

mixpar(expr)

Parameters

expr

-

Maple expression

Description

• 

The function mixpar will take nested calls to diff, and sort the sequence of differentiations so that they are sorted by lexicographical ordering on the variables of differentiation.

• 

The purpose of this function is to ensure that equal mixed partials are recognized as equal.

• 

The command with(difforms,mixpar) allows the use of the abbreviated form of this command.

Examples

withdifforms:defformf=0,x=0,y=0,z=0

dfx,y,z

xfx,y,zdx+yfx,y,zdy+zfx,y,zdz

(1)

d

0

(2)

mixpar

mixpar0

(3)

See Also

diff

sort

 


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