User talk:Poochy

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Welcome!

Hello, Poochy, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few good links for newcomers:

I hope you enjoy editing here and being a Wikipedian! Please sign your name on talk pages using four tildes (~~~~); this will automatically produce your name and the date. If you need help, check out Wikipedia:Where to ask a question, ask me on my talk page, or place {{helpme}} on your talk page and someone will show up shortly to answer your questions. Again, welcome! , SqueakBox 03:02, 9 October 2005 (UTC)

[edit] set notation

Although I agree with your edit comment on notation for sets, at standard deviation, the things for which the notation was being used are not sets. They are multisets, since members can appear more than once and the mutliplicity matters, or, in some cases, they are tuples, since members are identified with indices. The fact that the word dataset, or data set, is used, does not mean it must be taken literally. Tuples are normally written with round parentheses. Michael Hardy 19:14, 10 July 2006 (UTC)

I don't think they're tuples, as order matters in tuples and not data sets. I think "multiset" would indeed be the proper name to call them, as you said, and those are denoted using curly brackets as well.

OK, so when xi is the height in centimeters of the husband in the ith couple, and yi is the wife's height, then you cannot freely alter the order in (x1, ..., xn) and still have the same data set. At least to that extent, order matters. Data are often written in just this way, with subscripts. Michael Hardy 16:57, 11 July 2006 (UTC)

[edit] Period at the end of formula

Hi Poochy. I put back the periods at gradient, as per the math style manual, any formula that is at the end of sentence must have a period at the end. Cheers, Oleg Alexandrov (talk) 05:33, 13 April 2008 (UTC)

[edit] Image copyright problem with Image:BakusouKyoudaiLets&Go.jpg

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This is an automated notice by FairuseBot. For assistance on the image use policy, see Wikipedia:Media copyright questions. --14:33, 12 May 2008 (UTC)