User talk:Qef

Image for secant method
Hi. There seems to be a problem with the image Image:Secant_method_example_code_result.svg that you created. The blue lines should be secant lines, that is, they should go through two points of graph (the red curve). However, they don't. It looks like there is an error in the coefficients that you used to draw these lines. For the moment, I put the old image, Image:Secantmethod_jaredwf.png, back. There you see what the line in the last iteration should look like; it touches the graph at the root. It would be great if you could correct your SVG image, as I think it's very useful to have the secant lines at the earlier iterations. -- Jitse Niesen (talk) 14:26, 4 July 2008 (UTC)


 * You're right, those lines have the wrong gradient. I'll try to fix it.  --Qef (talk) 16:44, 4 July 2008 (UTC)
 * OK, how's that? I think I have the gradients right now (I was calculating x/y instead of y/x). --Qef (talk) 17:07, 4 July 2008 (UTC)


 * Looks good now. Thanks for the image. I put it back in the article. -- Jitse Niesen (talk) 17:29, 4 July 2008 (UTC)

Hypercube graphs
Hi Geoff!

Regarding User:Qef/Orthographic_hypercube_diagrams, I figured out the solution for the regular polygon perimeter skew orthogonal projections for the hypercubes, see results: File:Hypercube petrie polygons.png. I can tell you how. Maybe you could make a second set of graphs in SVG? The advantage of my graphs over the existing (regular) ones (and your SVG versions) is coloring vertices by overlap frequency. I tested up to 16-cube, edges get overwhelming, although maybe it would be better in SVG with thin/light antialiasing edges.

What do you think? Do you have some time to try some more? (I also want to do the demihypercube family, same as hypercubes, but alternate vertices are deleted) Tom Ruen (talk) 21:23, 27 August 2009 (UTC)

Hi! I have a request for you: could you please extend the diagrams over 10-cube? It seems that the color of the dots form a circular pattern around the center point of the diagram, it would be educational if the overall pattern (when lim n -> infinity) would be visualized.

While I'm at it, here's another request: Could you also produce a same kind of series for all the platonic solids and beyond?

The also looks interesting too. I bet the n-dimensional extensions of it are just iterations of this symmetry exhibiting the golden ratio. If so, showing this would too be educational. Probios (talk) 19:38, 27 June 2014 (UTC)

Orphaned non-free image File:Time Runner DVD or VHS cover.jpg
 Thanks for uploading File:Time Runner DVD or VHS cover.jpg. The image description page currently specifies that the image is non-free and may only be used on Wikipedia under a claim of fair use. However, the image is currently orphaned, meaning that it is not used in any articles on Wikipedia. If the image was previously in an article, please go to the article and see why it was removed. You may add it back if you think that that will be useful. However, please note that images for which a replacement could be created are not acceptable for use on Wikipedia (see our policy for non-free media).

PLEASE NOTE:


 * I am a bot, and will therefore not be able to answer your questions. If you have a question, place a template, along with your question, beneath this message.
 * I will remove the request for deletion if the file is used in an article once again.
 * If you receive this notice after the image is deleted, and you want to restore the image, click here to file an un-delete request.
 * To opt out of these bot messages, add  to your talk page.
 * If you believe the bot has made an error, please turn it off here and leave a message on my owner's talk page.

Thank you. DASHBot (talk) 05:48, 8 August 2011 (UTC)

Yuv420.svg
Kudos on makings such a clear and understandable image! Well done, and thanks!

Scraimer (talk) 10:44, 29 December 2011 (UTC)

File:Harmonic_partials_on_strings.svg
lovely work. 98.184.160.112 (talk) 19:07, 13 July 2013 (UTC)

ArbCom elections are now open!
Hi, You appear to be eligible to vote in the current Arbitration Committee election. The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to enact binding solutions for disputes between editors, primarily related to serious behavioural issues that the community has been unable to resolve. This includes the ability to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail. If you wish to participate, you are welcome to review the candidates' statements and submit your choices on the voting page. For the Election committee, MediaWiki message delivery (talk) 22:15, 30 November 2015 (UTC)