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I have the code below using the picture environment. There is a triangle like shape in which I would like to have a light grey shading. Is there anything in Latex that can do that? Thanks

\begin{centering}
\setlength{\unitlength}{.55cm}
\begin{picture}(1,1)
\put(1,-11){\vector(0,1){10}}
\put(0,-10 ...

I would like to reproduce this figure:
Screen Shot 2014-02-04 at 1.24.38 PM.png
Using xypic, my best attempts looks like
Screen Shot 2014-02-04 at 1.29.39 PM.png
or
Screen Shot 2014-02-04 at 1.39.48 PM.png
Notice how the longer formula on the second line stretches out the top line.

What ...

Can Texshop bring back the Save As option under the File menu in Lion? Is it even possible to just add it back to the File menu? I have seen other programs that run on Lion that still have the Save As option. The Duplicate option that Lion uses is not as quick and easy to use as Save As. Duplicate ...

I have had Texshop 2.10Beta8 on my Mac for years, and it worked great. I am looking at the preview pdf when I notice something I want to change, when I change it and Typeset it, the pdf shows up at the exact spot where I was looking before I made the change. This made it quick and easy to make ...

Sweet. Thank you very much.

I can cheat. I discovered this by accident.

\xrightarrow{h\circ k}\!\!\!\!\to

Using the empheq package, I can use the syntax \xhookrightarrow{f\circ g} for a right arrow with a hook on the left of the arrow to indicate that that map is an injection. This arrow also has f\circ g above it. What is the syntax for a right arrow with a double head on the right to indicate a ...

I compile Latex, and I want to print off just a few pages. I don't know what pages to print off because YAP does not display the page numbers. The Latex page numbers are there, but they do not correspond to the page numbers of the document. Can anybody help me turn on the page numbers?

I have TeXnicCenter 1 Beta 7.01. I have made newcommands, like \be, for myself. The Auto-completion is becoming very annoying. All the time when I am typing, I have to stop and wait for the box that has "\beta" to disappear. How do I turn off Auto-completion?