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midpoint

Keywords: 
Geometry
Type of Math Object: 
Definition
Major Section: 
Reference
Groups audience: 

Mathematics Subject Classification

51-00 no label found51M15 no label found

Comments

I'm sorry that this work temproarily only works in page image for now

the problem lies in latex2html not being able to correctly parse pstricks nodes (pst-node) which is a dependency on the package I use for the euclidean drawings.

I'll try to get the picture into a eps soon and include it instead of typing directly the code.
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

Maybe this bug should be forward to Ross Moore?

apk

I've yet to investigate, since nodes it's a bit advanced topic on PSTricks (latex package to do postcript drawings on LaTeX). I've used pstricks before, check "OrthogoncalCurves" entry for an example. I?ll tell you later what I find
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

the reason for the image not working is because the way pstricks work, didn't reserved space on the output, which was causing dvips -E not to ork correctly.

This is where I found the cause and solution
http://lists.gnu.org/archive/html/fhsst-authors/2004-11/msg00009.html
however, the suggested hints to get rid of the frame didn't work (so I left it for now)
and also.. there's now a bug on l2h which makes the picture not to be cropped correctly , I'm still investigating this (this also happened locally on my machine)
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

Just a thought --- when you have time and if it's not too much trouble, could you consider sharing some of your hard earned wisdom by writing a short document on adding illustrations to Planet Math entries? Maybe it could explain some of the basics of pstricks (enough to make simple geometric drawings), how to upload images so they come out right, suggest some graphics programs that help one edit the images, and the like. I, for one would find it very helpful. Up to now, I've shied away from writing entries which need illustrations, but if someone like you explained the basics needed to make the illustrations and it wasn't excessively difficult, I might start adding illustrated entries and even go back to add some illustrations to existing entries.

I think you have a great idea, but I'm better starting a collaborative document at docs section so everybody can contribute, dealing with all graphic-related issues, from how to include an eps, how to convert them from other formats, what programs can *correctly* handle EPS on windows, gnuplot, etc to doing graphics directly with pstricks, xypic and quirks that arise

Most of the external-graphic inclusion is a bit straightforward, but I've been thinking that the part dealign with graphics directly in code would be only efficient havint many many examples (from entries).

Just like I described how to do polar plots with pstricks yesterday, but doing similar stuff for lines, polygons, function graphs, graphs, and geometrical drawings. So if you could compile a list of entries needing illustrations (of many kinds) it'll be great so I can start working the detailed examples. So far the midpoint one and the orthogonal curves are considered, but they deal with some of the more advanced topics, and simpler examples are also appreciated.
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

Here's the link. I couldn't get it to be a site doc due to tech issues, so I'll maintaint it for now as priv collaboration.

http://planetmath.org/?op=getobj&from=collab&id=53
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

Before you go to far with this, check out the Graphics section of the PM Content and Style guide. It includes a short description of various graphics packages and how to included eps files in PM entries. Due to some problems the guide is not visible unless you click on Edit and then Render.

Yes I did, notice however that there is no problem having such document, since the whole graphic creation and handling is a broad subject. Also, suppose somebody is looking for help or information due to some pics problem, is not so clear the information is to be sought on the content and style guide, thus the need for the document on graphics
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

I was concerned about duplication of effort. The relevant parts of the guide can pretty much be copy-pasted into the new document.

I think some duplication is good; people do not read with perfect recall. Perhaps appropriate portions can be merged back into the general guide periodically.

apk

I was reading the doc, but it onlly talks briefly, I was meaning a doc describing in details options (for instance, \includegraphics has many options) and having worked examples for xypic and pstricks
f
G -----> H G
p \ /_ ----- ~ f(G)
\ / f ker f
G/ker f

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