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FunctionAdvisor/differentiation_rule

return the differentiation rule of a given mathematical function

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

FunctionAdvisor(differentiation_rule, math_function)

Parameters

differentiation_rule

-

literal name; 'differentiation_rule'

math_function

-

Maple name of mathematical function

Description

• 

The FunctionAdvisor(differentiation_rule, math_function) command returns both the differentiation rule (first derivative) and the symbolic differentiation rule (nth derivative) for the function. The result thus consists of a sequence of two equations, with inert derivatives on the left-hand sides (represented using Diff) and the corresponding values of these derivatives on the right-hand sides

Examples

FunctionAdvisordifferentiation_rule,arcsin

ⅆⅆzarcsinz=1z2+1,ⅆnⅆznarcsinz=2n1z1nMeijerG0,12,12,,0,12+12n,12n,z2π

(1)

FunctionAdvisordifferentiation_rule,dilog

ⅆⅆzdilogz=lnz1z,ⅆnⅆzndilogz=1nMeijerG1n,1n,,0,n,z1

(2)

The variables used by the FunctionAdvisor command to create the calling sequence are local variables. To make the FunctionAdvisor command return results using global variables, pass the actual function call instead of the function name.  Compare the following two input and output groups.

eq1FunctionAdvisordiff,ζ

* Partial match of "diff" against topic "differentiation_rule".

eq1:=sζn,s,a=ζn+1,s,a,aζn,s,a=sζn,s+1,a{0n=0nζn1,s+1,aotherwise

(3)

haseq1,a,haseq1,b,haseq1,z

false,false,false

(4)

eq2FunctionAdvisordiff,ζa,b,z

* Partial match of "diff" against topic "differentiation_rule".

eq2:=bζa,b,z=ζa+1,b,z,zζa,b,z=bζa,b+1,z{0a=0aζa1,b+1,zotherwise

(5)

haseq2,a,haseq2,b,haseq2,z

true,true,true

(6)

For functions which accept different numbers of parameters, you can specify for which function call you want the differentiation rule by specifying the function with the appropriate number of arguments. For example, for Zeta, if given with only one argument specified, it represents the Hurwitz Zeta function and its differentiation rule is the following.

FunctionAdvisordiff,ζz

* Partial match of "diff" against topic "differentiation_rule".

ⅆⅆzζz=ζ1,z,ⅆnⅆznζz=ζn,z

(7)

As another example, consider the exponential integral Ei.

FunctionAdvisordifferentiation_rule,Eiz

ⅆⅆzEiz=ⅇzz,ⅆnⅆznEiz=ⅇz_k1=0n1_k1!1_k1z1_k1binomialn1,_k1

(8)

FunctionAdvisordifferentiation_rule,Eia,z

aEia,z=zaMeijerG,0,0,1,1,a,,z,zEia,z=Eia1,z,nznEia,z=1nMeijerG0,a,,0,a1,n,zzn+πza1nΓansinπa

(9)

See Also

diff

Ei

FunctionAdvisor

FunctionAdvisor/DE

FunctionAdvisor/topics

symbolic differentiation

Zeta

 


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