How can I typeset those three mathematical symbols?

Question

I need to typeset (in one of my post on Mathematics.SX) the following three mathematical symbols but I don't know how:

the symbol for the Heaviside function,
the symbol for "not equal", as in "x not equal to 0",
the symbol for a partial derivative.

Any guidance would be appreciated.

You really need to be more precise about what you want. However, for finding concrete symbols try http://tex.stackexchange.com/q/14/15925 — Andrew Swann, Aug 25 '14 at 09:43
Partial derivative operator symbol: \partial ;-) Heaviside function symbol is normally the upcase \Theta . Not equal: \neq. I don't know, whether they work in Math.SX — , Aug 25 '14 at 09:45
I dont get what u mean by upcase \Theta. Could u please explain. Thanks — yswong, Aug 25 '14 at 09:49
Hi and welcome to TeX.SX! You can have a look at our starter guide. Please note that Math.SE uses MathJaX, which is not exactly LaTeX. I believe that most relevant stuff is available in Math.SE's MathJax basic tutorial and quick reference, the list includes all of greek letters, \neq and \partial :) — yo', Aug 25 '14 at 09:50
As far as I know (unless there are several Heaviside functions) the most common notation is simply H, others include u (unit step function) or θ. Never see Θ. For partial derivatives, I would recommend the esdiff package, which has handy macros for typetting partial derivatives of any order. — Bernard, Aug 25 '14 at 10:45
@Jubobs: Yes, this package might be of help for other users. Let me time to add an example… — Bernard, Aug 25 '14 at 11:08
@Jubobs: I can't add an example with esdiff as the post has been closed and the mentioned link is not relevant to include it. Do you know how one can ask for re-opening it? — Bernard, Aug 25 '14 at 11:47
@Bernard I voted to reooen it. Wait for four other people to do the same and you should be able to post an answer. — jub0bs, Aug 25 '14 at 14:08
@yswong: You can draw the symbol on http://write-math.com/classify/ and share a link / embed the image here. Eventually it will also directly tell you what the symbol is. (I'm still working on it.) — Martin Thoma, Aug 25 '14 at 15:42
I think this question should be deleted. The title is useless and I don't see a way to fix it. Eventually you could open 3 new questions, one for each symbol with a better title. But I don't think that makes sense. In future, you might eventually want to try http://chat.stackexchange.com/rooms/41/tex-latex-and-friends — Martin Thoma, Aug 25 '14 at 15:46
@moose: I agree with you, as the OP did not manage to show up and add more information. I voted for close earlier, but it was reopened :/ — , Aug 25 '14 at 20:15
@ChristianHupfer I did not vote for close, but I flagged it. I don't want it to be closed. Closed questions should contribute something (like another way to describe a problem and hence making it easier for others to google for it). This question (as it is stated) is useless for others. So to all moderators who read this: Please delete it! — Martin Thoma, Aug 25 '14 at 20:19
@moose: Private opinion: The question stands as a bad example ;-) — , Aug 25 '14 at 20:20

Bernard · Answer 1 · 2017-08-01T10:47:28.877

As far as I know (unless there are several Heaviside functions) the most common notation is simply H, others include u (unit step function) or θ (\theta). Never seen Θ (\Theta). For partial derivatives, I would recommend the esdiff package, which has handy macros for typesetting partial derivatives of any order.

Here is an example with the esdiff package:

\documentclass[11pt,a4paper]{article}
\usepackage[utf8]{inputenc}
\usepackage{mathtools}
\usepackage[thinc]{esdiff}

\DeclareMathOperator{\Heavi}{H}

\begin{document}

    \[ \diff{(\Heavi(x))}{x} = \delta(x) ,\qquad \diff[2]{(\sin x)}{x} = -\sin x , \qquad \diff*{\mathrm{e}^x}{x}{0} = 1 \]%

    \[ \diffp{f}{{x^2}{y^3}},\qquad \diffp*{f}{{x^2}{y^3}}{(0,0)} \]%

\end{document}

enter image description here

How can I typeset those three mathematical symbols?

1 Answers1