Math & Science ⇒ DeclareMathOperator-like commands

[dandus]

I want to define commands that work like DeclareMathOperator, allowing to deine other commands in a straightforward way.

E.G., I want to be able to write something like

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\DeclarePartialDerivative{a}{\alpha}

and make it work like

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\newcommand\dea[1]{\frac{\partial #1}{\partial \alpha}}

so that every partial derivative I need is defined as a "\de[something] command."
Any suggestion? I tried to check the file where \DeclareMathOperator is defined (amsopn.sty), but still couldn't understand what to do.

Thankyou in advance!

[localghost]

I cannot really comprehend what you expect. But perhaps the esdiff package can be helpful.


Thorsten

[dandus]

I did find that useful, thankyou, though it wasn't what I wanted. I'll try to make myself clearer: Suppose I have a whole lot of derivatives to define in my source code. For example, suppose I want to define partial derivatives with respect to x,y,z,t and \alpha as \dex,\dey,\dez,\det,\dea. Usually, what I'd do is give

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\newcommand\dei[2]{\frac{\partial #1}{\partial #2}}
\newcommand\dex[1]{\dei{#1}x}
\newcommand\dey[1]{\dey{#1}y}
\newcommand\dez[1]{\dez{#1}z}
\newcommand\det[1]{\det{#1}t}
\newcommand\dea[1]{\det{#1]\alpha}

but I want to define a \DeclarePartialDerivative command which defines the same commands, but is written in source as

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\DeclarePartialDerivative{x}{x}
\DeclarePartialDerivative{y}{y}
\DeclarePartialDerivative{z}{z}
\DeclarePartialDerivative{t}{t}
\DeclarePartialDerivative{a}{\alpha}

how could I do?

[kaiserkarl13]

You might have a look at the amsmath package and how it defines \DeclareMathOperator. That's a similar idea to what you're trying to do.

[dandus]

You might have a look at the amsmath package and how it defines \DeclareMathOperator. That's a similar idea to what you're trying to do.

That's what I did, but couldn't figure out how it worked either. That's why I was asking about it.