User talk:Trevorgoodchild

Welcome!

Hello, Trevorgoodchild, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are some pages that you might find helpful:

I hope you enjoy editing here and being a Wikipedian! Please sign your messages on discussion pages using four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask your question and then place {{helpme}} before the question on your talk page. Again, welcome!

And don't forget, the edit summary is your friend. :) – Oleg Alexandrov (talk) 16:07, 29 February 2008 (UTC)[reply]

Note[edit]

I'd just like to say thank you for all the work you are doing with the CG page. Looks great! Adam McCormick 07:20, 7 March 2007 (UTC)[reply]

Oh and I love your Username reference Adam McCormick 07:21, 7 March 2007 (UTC)[reply]

On headings[edit]

Hi. I have a small note on style. One should use lowercase in sections names, so

=== Invariant formulations of div, grad, and curl ===

rather than

=== Invariant Formulations of Div, Grad, and Curl ===

This per the style manual. Just thought I'd let you know. You can reply here if you have comments. Cheers, Oleg Alexandrov (talk) 16:07, 29 February 2008 (UTC)[reply]

Thanks -- yep, I keep forgetting that's the rule. :) Trevorgoodchild (talk) 18:54, 29 February 2008 (UTC)[reply]

Cut and paste moves[edit]

You recently performed a page move (on Computer graphics) by cutting and pasting the content. This is against Wikipedia policy for copyright reasons, because when a page is moved that way it loses its edit history. I have fixed the moves - if you need to move articles in future, you should use the 'move' button at the top of the page instead (see WP:MOVE for more instructions, including how to get administrator assistance when the target page already exists). Regards, EyeSerene^talk 14:13, 24 July 2008 (UTC)[reply]

Image without license[edit]

Unspecified source for Image:Cornellbox pathtracing irradiancecaching.png[edit]

Thanks for uploading Image:Cornellbox pathtracing irradiancecaching.png. I noticed that the file's description page currently doesn't specify who created the content, so the copyright status is unclear. If you did not create this file yourself, then you will need to specify the owner of the copyright. If you obtained it from a website, then a link to the website from which it was taken, together with a restatement of that website's terms of use of its content, is usually sufficient information. However, if the copyright holder is different from the website's publisher, then their copyright should also be acknowledged.

As well as adding the source, please add a proper copyright licensing tag if the file doesn't have one already. If you created/took the picture, audio, or video then the {{GFDL-self}} tag can be used to release it under the GFDL. If you believe the media meets the criteria at Wikipedia:Fair use, use a tag such as {{non-free fair use in|article name}} or one of the other tags listed at Wikipedia:Image copyright tags#Fair use. See Wikipedia:Image copyright tags for the full list of copyright tags that you can use.

If you have uploaded other files, consider checking that you have specified their source and tagged them, too. You can find a list of files you have uploaded by following this link. Unsourced and untagged images may be deleted one week after they have been tagged, as described on criteria for speedy deletion. If the image is copyrighted under a non-free license (per Wikipedia:Fair use) then the image will be deleted 48 hours after 17:53, 24 July 2008 (UTC). If you have any questions please ask them at the Media copyright questions page. Thank you. Do you want to opt out of receiving this notice? --MifterBot ^{(Talk • Contribs • Owner)} 17:53, 24 July 2008 (UTC)[reply]

LCP[edit]

Regarding your latest change to Linear complementarity problem, are you sure it's correct to remove the qualifications on M? Although positive-definiteness is sufficient for the LCP to have a unique solution, it is possible to phrase a well-posed LCP with M indefinite, for instance, M = {{1, 0},{0,-1}} and b = {-1, 0}. Granted, for the practical applications I've seen M is usually semi-definite, but if we're making that assumption we should state it and hold to it throughout the article. TotientDragooned (talk) 03:55, 16 September 2008 (UTC)[reply]

Hmm... well, my reasoning is the following: the original sentence said, "Although any quadratic programming algorithm can solve an LCP...". When I saw "quadratic programming algorithm" I assumed it meant an algorithm for solving convex quadratic programs, since those are the only ones that you can really solve (if the problem's not convex then solving it is in general NP hard). If that were the case, then only definite LCPs can be solved by such algorithms (because indefinite LCPs are not convex). It is possible that the original author meant "quadratic programming algorithm" to refer to algorithms that also solve non-convex QPs, but that would seem a little silly: of course an algorithm for solving non-convex QPs can solve LCPs, because such an algorithm could be used to solve any NP complete problem! In either case, I'll modify that sentence to make it clearer.

Looks good! Thanks. TotientDragooned (talk) 03:24, 17 September 2008 (UTC)[reply]

ArbCom elections are now open![edit]

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) 16:31, 23 November 2015 (UTC)[reply]

commons:commons:deletion requests/Stanford Bunny images[edit]

Hi, thought I would let you know about this DR since the auto-notifier only works for uploaders at Commons, not the local uploaders of transwikied files (of which my understanding is that you are one, in this case). Cheers! Arlo James Barnes 23:05, 18 March 2022 (UTC)[reply]