User talk:David Eppstein

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Welcome![edit]

I took the liberty of placing my welcome on top of the welcome of the stinky bot which got there before me. Hopefully the bot did not get offended. Oleg Alexandrov 05:00, 6 May 2007 (UTC)[reply]

Bot welcome[edit]

Welcome to the Commons, David Eppstein!
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geometry category[edit]

Dear David,

I have cleaned up the geometry category, only your files are remaining as you were not happy with one of my edits. It would be very nice of you if you could sort your files into a suitable subcategory. Geometry (like mathematics) is a big category, which should be empty from pictures.

best wishes, Darapti

Ok, I've cleared out the rest. To do so I added two more subcategories, discrete geometry and computational geometry. —David Eppstein 06:25, 28 October 2007 (UTC)[reply]

thanks, well done


File:Octahedral_diagram_deligne.svg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.

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Ryan Reich (talk) 05:51, 14 January 2009 (UTC)[reply]

File:Stephen_Smale.jpg[edit]

File:Stephen_Smale.jpg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.

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Please remember to respond to and – if appropriate – contradict the arguments supporting deletion. Arguments which focus on the nominator will not affect the result of the nomination. Thank you!
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Nsk92 (talk) 02:19, 16 December 2010 (UTC)[reply]

Quality Image Promotion[edit]
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Comments Lovely composition. --King of Hearts 10:45, 10 May 2011 (UTC)[reply]

Quality Image Promotion[edit]
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Comments Good quality. --Quartl 17:13, 16 May 2011 (UTC)[reply]

Quality Image Promotion[edit]
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Comments Good quality. --Saffron Blaze 20:38, 30 May 2011 (UTC)[reply]

Your image has been reviewed and promoted

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Comments Good quality. --Saffron Blaze 14:15, 30 May 2011 (UTC)[reply]

Quality Image Promotion[edit]
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Comments Good quality. --Taxiarchos228 18:43, 31 May 2011 (UTC)[reply]

TUSC token 9fa35723c5367067637c78cad809f4e2[edit]

I am now proud owner of a TUSC account!

File:Grigory_Margulis.jpg[edit]

File:Grigory_Margulis.jpg has been listed at Commons:Deletion requests so that the community can discuss whether it should be kept or not. We would appreciate it if you could go to voice your opinion about this at its entry.

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— Yerpo Eh? 12:34, 15 January 2012 (UTC)[reply]

Quality Image Promotion[edit]
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Comments QI to me. DimiTalen 05:48, 16 April 2012 (UTC)[reply]

File:Tucker's Genus Two Group.jpg[edit]

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Please remember to respond to and – if appropriate – contradict the arguments supporting deletion. Arguments which focus on the nominator will not affect the result of the nomination. Thank you!
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Eleassar (t/p) 13:29, 19 October 2012 (UTC)[reply]

Autopatrol given[edit]

Hello. I just wanted to let you know that I have granted autopatrol rights to your account; the reason for this is that I believe you are sufficiently trustworthy and experienced to have your contributions automatically marked as "reviewed". This has no effect on your editing, it is simply intended to make it easier for users that are monitoring Recent changes or Recent uploads to find unproductive edits amidst the productive ones like yours. In addition, the Flickr upload feature and an increased number of batch-uploads in UploadWizard, uploading of freely licensed MP3 files, overwriting files uploaded by others and an increased limit for page renames per minute are now available to you. Thank you. INeverCry 20:16, 8 January 2013 (UTC)[reply]

Thanks! —David Eppstein (talk) 20:16, 8 January 2013 (UTC)[reply]

Picture of the Year voting round 1 open[edit]

Dear Wikimedians,

Wikimedia Commons is happy to announce that the 2012 Picture of the Year competition is now open. We're interested in your opinion as to which images qualify to be the Picture of the Year for 2012. Voting is open to established Wikimedia users who meet the following criteria:

  1. Users must have an account, at any Wikimedia project, which was registered before Tue, 01 Jan 2013 00:00:00 +0000 [UTC].
  2. This user account must have more than 75 edits on any single Wikimedia project before Tue, 01 Jan 2013 00:00:00 +0000 [UTC]. Please check your account eligibility at the POTY 2012 Contest Eligibility tool.
  3. Users must vote with an account meeting the above requirements either on Commons or another SUL-related Wikimedia project (for other Wikimedia projects, the account must be attached to the user's Commons account through SUL).

Hundreds of images that have been rated Featured Pictures by the international Wikimedia Commons community in the past year are all entered in this competition. From professional animal and plant shots to breathtaking panoramas and skylines, restorations of historically relevant images, images portraying the world's best architecture, maps, emblems, diagrams created with the most modern technology, and impressive human portraits, Commons features pictures of all flavors.

For your convenience, we have sorted the images into topic categories. Two rounds of voting will be held: In the first round, you can vote for as many images as you like. The first round category winners and the top ten overall will then make it to the final. In the final round, when a limited number of images are left, you must decide on the one image that you want to become the Picture of the Year.

To see the candidate images just go to the POTY 2012 page on Wikimedia Commons

Wikimedia Commons celebrates our featured images of 2012 with this contest. Your votes decide the Picture of the Year, so remember to vote in the first round by January 30, 2013.

Thanks,
the Wikimedia Commons Picture of the Year committee

Delivered by Orbot1 (talk) at 09:04, 19 January 2013 (UTC) - you are receiving this message because you voted last year[reply]

Picture of the Year 2013 R1 Announcement[edit]

Picture of the Year 2013 R2 Announcement[edit]

Round 2 of Picture of the Year 2013 is open![edit]

2012 Picture of the Year: A pair of European Bee-eaters in Ariège, France.

Dear Wikimedians,

Wikimedia Commons is happy to announce that the second round of the 2013 Picture of the Year competition is now open. This year will be the eighth edition of the annual Wikimedia Commons photo competition, which recognizes exceptional contributions by users on Wikimedia Commons. Wikimedia users are invited to vote for their favorite images featured on Commons during the last year (2013) to produce a single Picture of the Year.

Hundreds of images that have been rated Featured Pictures by the international Wikimedia Commons community in the past year were entered in this competition. These images include professional animal and plant shots, breathtaking panoramas and skylines, restorations of historical images, photographs portraying the world's best architecture, impressive human portraits, and so much more.

There are two total rounds of voting. In the first round, you voted for as many images as you liked. The top 30 overall and the most popular image in each category have continued to the final. In the final round, you may vote for just one image to become the Picture of the Year.

Round 2 will end on 7 March 2014. https://commons.wikimedia.org/wiki/Special:MyLanguage/Commons:Picture_of_the_Year/2013/Introduction/en Click here to learn more and vote »]

Thanks,
the Wikimedia Commons Picture of the Year committee

You are receiving this message because you voted in the 2013 Picture of the Year contest.

This Picture of the Year vote notification was delivered by MediaWiki message delivery (talk) 19:22, 22 February 2014 (UTC)[reply]

Picture of the Year 2013 Results Announcement[edit]

Picture of the Year 2013 Results[edit]

The 2013 Picture of the Year. View all results »

Dear David Eppstein,

The 2013 Picture of the Year competition has ended and we are pleased to announce the results: We shattered participation records this year — more people voted in Picture of the Year 2013 than ever before. In both rounds, 4070 different people voted for their favorite images. Additionally, there were more image candidates (featured pictures) in the contest than ever before (962 images total).

  • In the first round, 2852 people voted for all 962 files
  • In the second round, 2919 people voted for the 50 finalists (the top 30 overall and top 2 in each category)

We congratulate the winners of the contest and thank them for creating these beautiful images and sharing them as freely licensed content:

  1. 157 people voted for the winner, an image of a lightbulb with the tungsten filament smoking and burning.
  2. In second place, 155 people voted for an image of "Sviati Hory" (Holy Mountains) National Park in Donetsk Oblast, Ukraine.
  3. In third place, 131 people voted for an image of a swallow flying and drinking.

Click here to view the top images »

We also sincerely thank to all 4070 voters for participating and we hope you will return for next year's contest in early 2015. We invite you to continue to participate in the Commons community by sharing your work.

Thanks,
the Picture of the Year committee

You are receiving this message because you voted in the 2013 Picture of the Year contest.

Delivered by MediaWiki message delivery (talk) 22:59, 26 March 2014 (UTC)[reply]

File:Levi's lemma.svg[edit]

If you still have the [LaTeX, I assume] source for this, please covert its fonts to SVG paths/shapes as well. The SVG itself looks fine on Windows, but the mediawiki software runs on Linux, which substitutes fonts with slightly different metrics. As a result, the green rectangle cuts right across the middle of a "1" in the way mediawiki renders it (as png conversion) in the article(s) were it's used. You can use dvisvgm --no-fonts to force conversion of font glyphs to paths/shapes. JMP EAX (talk) 11:23, 1 September 2014 (UTC)[reply]

The really weird thing is that your SVG actually uses Liberation Serif as font (which is a Linux/RedHat font), but the (supposedly Linux) boxes where mediawiki does conversion to png apparently have the font with different metrics. Either that, or they might not have the font installed at all. Or maybe their SVG2PNG conversion program is bugged somehow. JMP EAX (talk) 12:03, 1 September 2014 (UTC)[reply]

It's not LaTeX. I drew it in Adobe Illustrator and then converted the fonts from times to liberation by doing a text replace in the svg file. So what you see is all there is. —David Eppstein (talk) 16:54, 1 September 2014 (UTC)[reply]
I'd be interested in any comments you have about tools for generating SVGs. Are your graphs usually hand-drawn in Illustrator? I was looking at the source for some of them and they are wonderfully clean. - Pointillist (talk) 09:43, 8 October 2014 (UTC)[reply]
Yes, usually hand-drawn. Some of the more complicated ones use Python scripts to generate svg instead; those usually have source code included on the description page. —David Eppstein (talk) 16:05, 8 October 2014 (UTC)[reply]

Files with empty category[edit]

David, is there a reason that you're marking your files as no category?[1] It makes my bot think that they aren't properly licensed. If so, that's fine, I'll just have to ignore them. But if not, please don't mark them as such. Magog the Ogre (talk) (contribs) 18:58, 1 February 2015 (UTC)[reply]

Sorry, that wasn't the intent of the edit. It was because the upload wizard didn't include the correct CC license option for the file (should have been cc-by-sa-2.0-de, best I could get in the wizard was cc-by-sa-2.5) so I copied that line from another file, which presumably also had the same no-category marking. —David Eppstein (talk) 20:11, 1 February 2015 (UTC)[reply]

Reuleaux triangles‎[edit]

Doubt that this categorization is generally applicable to Shield of the Trinity diagrams, since the vertices aren't visible, it really doesn't look like the points where two arcs meet in File:ScutumFidei.jpg‎ are the centers of the remaining arc, etc. AnonMoos (talk) 19:00, 26 May 2015 (UTC)[reply]

It's definitely not applicable to most of those diagrams, because they don't even have all three sides rounded. But the one I tagged looked close enough to include, I think. —David Eppstein (talk) 19:18, 26 May 2015 (UTC)[reply]

Triquetra[edit]

First off triquetras don't have to be interlaced at all, and they can also be double-interlaced (File:Triquetra-Double.svg etc.), so it's only single-interlaced triquetras which are relevant. And Incomplete Borromean rings interlacings only have the "same" interlace pattern as a single-interlaced triquetra if you choose to join the loose ends together in a particular way, which is an additional step beyond what is present in the visual images themselves. AnonMoos (talk) 08:36, 2 June 2015 (UTC)[reply]

Where might I have heard your name? Also lovely SVGs[edit]

Hello there, I've heard your name somewhere before but I cannot think where! May I just say though while I am here, lovely collection of images, I especially like:

How was it made? I've always found the fact that SVG uses paths and cannot do general curves beyond arcs rather a limitation that defeats the whole "vector" aspect of it (to some extent) but you got away with it! 90.199.52.141 20:57, 17 March 2016 (UTC)[reply]

Thanks — I'm pretty sure that was just Adobe Illustrator. As for where you might have seen my name, I have no idea, but see en:David Eppstein for more about me. —David Eppstein (talk) 21:05, 17 March 2016 (UTC)[reply]

FoP[edit]

Hi, for no-FoP related deletions please always file a regular DR. {Copyvio} should only be used if the image itself is taken from somewhere. Jcb (talk) 22:40, 9 June 2016 (UTC)[reply]

Ok, thanks for the clarification. My Google searches for the proper way to tag badly-licensed images did not make this clear. —David Eppstein (talk) 22:42, 9 June 2016 (UTC)[reply]

Dayhoff photos[edit]

FYI, I've converted your copyvio tags to a deletion request. Feel free to comment on it further. Guanaco (talk) 00:57, 20 October 2017 (UTC)[reply]

Ok, thanks for handling this. —David Eppstein (talk) 01:04, 20 October 2017 (UTC)[reply]

Round 2 of Picture of the Year 2018 is open![edit]

Dear David Eppstein,

You are receiving this message because we noticed that you voted in R1 of the 2018 Picture of the Year contest, but not yet in the second round. Wikimedia users are invited to vote for their favorite images featured on Commons during the last year (2018) to produce a single Picture of the Year.

Hundreds of images that have been rated Featured Pictures by the international Wikimedia Commons community in the past year were entered in this competition. These images include professional animal and plant shots, breathtaking panoramas and skylines, restorations of historical images, photographs portraying the world's best architecture, impressive human portraits, and so much more.

There are two total rounds of voting. In the first round, you voted for as many images as you liked.

In the final (and current) round, you may vote for a maximum of three images. The image with the most votes will become the Picture of the Year 2018.

Round 2 will end 17 March 2019, 23:59:59.

Click here to vote now!

Thanks,
the Wikimedia Commons Picture of the Year committee 18:04, 16 March 2019 (UTC)

Tietze-Moebius.svg[edit]

More symmetric rendering

Hi Prof Eppstein,

Thanks for the beautiful math diagrams. I wondered it would be clearer to the reader if File:Tietze-Moebius.svg was split into 3 inner and 3 outer regions, which can be distinguished with primary and secondary colours, or dark and light. Would you mind if I redrew it?

Thanks, cmɢʟee ⋅τaʟκ 10:00, 5 October 2021 (UTC)[reply]

If you want to draw another version and upload it as another filename, please go ahead. However, I don't think it's a good idea to overwrite the existing filename with a different drawing. —David Eppstein (talk) 16:32, 5 October 2021 (UTC)[reply]
OK, I won't overwrite your diagram, and instead made this. cmɢʟee ⋅τaʟκ 21:40, 5 October 2021 (UTC)[reply]


File:Anna Skripka, Berkeley, 2018.jpg[edit]

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Awiki2022 (talk) 00:56, 11 June 2022 (UTC)[reply]

Volumes of pieces of dodecahedron.[edit]

Hi, I came across this finding and wondered whether it was your discovery. If so, is it published anywhere reputable? Thanks, cmɢʟee ⋅τaʟκ 10:31, 12 June 2022 (UTC)[reply]

That was definitely my post. I don't know of any publication. David Eppstein (talk) 16:08, 12 June 2022 (UTC)[reply]
Good insight, thanks for sharing with the world. cmɢʟee ⋅τaʟκ 07:14, 13 June 2022 (UTC)[reply]

Round 1 of Picture of the Year 2022 voting is open![edit]

2022 Picture of the Year: Saint John Church of Sohrol in Iran.

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Dear Wikimedian,

Wikimedia Commons is happy to announce that the 2022 Picture of the Year competition is now open. This year will be the seventeenth edition of the annual Wikimedia Commons photo competition, which recognizes exceptional contributions by users on Wikimedia Commons. Wikimedia users are invited to vote for their favorite images featured on Commons during the last year (2022) to produce a single Picture of the Year.

Hundreds of images that have been rated Featured Pictures by the international Wikimedia Commons community in the past year are all entered in this competition. These images include professional animal and plant shots, breathtaking panoramas and skylines, restorations of historical images, photographs portraying the world's best architecture, impressive human portraits, and so much more.

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Delivered by MediaWiki message delivery (talk) 09:14, 20 April 2023 (UTC)[reply]

File:Chinese_postman_problem.svg[edit]

Re your question "please explain. Images normally link to their file. Why does this need a redundant and explicit link?" it's so that the animation of the little car can be seen. Cheers, cmɢʟee ⋅τaʟκ 09:05, 25 January 2024 (UTC)[reply]

Does that change how the image is displayed inline? David Eppstein (talk) 17:46, 25 January 2024 (UTC)[reply]
Not as far as I know. Cheers, cmɢʟee ⋅τaʟκ 13:26, 27 January 2024 (UTC)[reply]
So it's entirely a workaround for the fact that the default behavior when clicking on an image is to open a viewer pane instead of actually going to the commons page for the image? Are you perhaps unaware of Preferences → Gadgets → Redirect image links to Commons for files hosted there ? David Eppstein (talk) 18:56, 27 January 2024 (UTC)[reply]
No, I'm unaware of it. Regardless, changing my preference will affect it on only my account. Other accounts will still get the Media viewer page showing a PNG render. cmɢʟee ⋅τaʟκ 05:20, 30 January 2024 (UTC)[reply]
So convince the mediawiki developers to fix this so that animations by default go to somewhere that shows the animation. Hacking around it on a one-picture-at-a-time basis is not the way. David Eppstein (talk) 07:23, 30 January 2024 (UTC)[reply]
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