Talk:Sierpiński carpet

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[edit] Image format

The previous version of the article contained http://meta.wikipedia.com/upload/Sierp.jpg

This JPEG image has coloring artifacts around the edges of elements (i.e. everywhere) and is over 250 kibibytes in size. I have created a different version in PNG format that takes less than 2 percent of the original file's size and uploaded it to the Meta-Wikipedia, saving Bomis over 250 KiB per hit. (Isn't deflation wonderful?) --Damian Yerrick

It is. The previous version was mine, but I don't regret having elicited a more economic carpet :)). Your triangle is nice too. -- Piotr Gasiorowski

[edit] Accurate images

The article is about the Sierpinski carpet itself, not about different ways of constructing it. The existing images (Sierpinski.png and Fractal squares.png) contain artifacts that are not part of the carpet, and are not accurate because of anti-aliasing. Also, there is no reason to include more than one image. For these reasons, I created one new, pixel-perfect image (SierpinskiCarpet6.png) to replace the old ones.
—Herbee 17:05, August 20, 2005 (UTC)

Both the images you removed from Sierpinski carpet where clear images, if sized correctly. See Wikipedia:Picture tutorial. Hyacinth 21:20, 20 August 2005 (UTC)
Thanks, I know all about stretching images. I didn't say the old images were unclear, whatever "clear" means in this context. I am saying that Fractal squares.png is misleading: the image contains spurious black lines, and has smallest holes of different sizes.
The other image, Sierpinski.png, actually gives a good impression of the Sierpinski carpet. I may have removed it too quickly. To fix the article, I will include images like my SierpinskiCarpet6.png to show the construction process.
—Herbee 16:35, August 21, 2005 (UTC)
Thanks for the note. "Unclear" was your word, but I do prefer your depiction of the first few iterations. Hyacinth 22:57, 21 August 2005 (UTC)

The text says

The illustration below shows the first few iterations in the construction process.

but the illustrations have disappeared (OrphanBot deleted them because they were unsourced). If the single existing image is adequate, then this text should be fixed. If we want to show the steps in its construction, then the images should be restored and released into PD. --171.64.71.123 23:49, 14 July 2006 (UTC)

[edit] Menger sponge

Not mentioned here is the 3-d analog of the Carpet, the Sponge. However, it was discovered not by Sierpinski but by Karl Menger. I'm not sure if the Carpet was discovered by Menger. Does anyone have more info? David 19:48 Nov 20, 2002 (UTC)

According to a quick web search, Sierpinski proved certain features of the Sierpinski Carpet in 1916 (when Menger would have been 14); Menger published his paper about the Sponge in 1926. Chas zzz brown 01:44 Nov 21, 2002 (UTC)

Thanks! David 21:26 Nov 21, 2002 (UTC)

[edit] Copyright

How can a simple graph of a mathematical mapping be copyrighted? That seems unreasonable to me. David 17:46 Apr 24, 2003 (UTC)

[edit] HTML approach

For an HTML approach of approximating a Sierpinski carpet, see dive into mark.

I'm sure the intention was clever, but it's pretty hard to figure out as it stands. What is this monstrosity supposed to demonstrate? I'm leaving the link here in case some kind of explanation is forthcoming.
—Herbee 17:42, August 21, 2005 (UTC)

[edit] java not pasteable

Why have java code if it isn't pasteable into Eclipse such that it will produce a running app? OK, call me a java lamer, but I can't get it to run. Either updated code, or a pointer to how to get the samples working would be appreciated. --Markhu 03:11, 24 August 2006 (UTC)

For anybody interested, in Eclipse you can run this right away by putting it in a new java file and running it as an Applet (hit Shift+Alt+X with the file open, then hit A). 69.3.185.246 01:51, 19 February 2007 (UTC)

[edit] Naming: Sierpiński versus Sierpinski

Apparently this is named after Wacław Sierpiński, so why doesn't the spelling reflect that accurately here, as it does for Sierpiński's constant and Sierpiński curve? Does this need fixing up? —DIV 128.250.204.118 03:39, 6 January 2007 (UTC)

See Talk:Sierpinski number. I haven't examined "Sierpinski carpet". PrimeHunter