Talk:Masatran, R.

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Contents

1 Deleting redirects 2 Tamil vs Malayalam 3 IIT vs. Indian Institute of Technology 4 ISO 8601 date format 4.1 Why ISO 8601? 5 Navarathnas 6 Is not the mean of the standard Cauchy distribution zero? 7 Bounds of (standard deviation divided by mean), given that there are no negative samples 8 Wikipedia:Indian wikipedians' notice board 9 Seeking you support

Deleting redirects

Unfortunately, no, you cannot delete redirects. If you want to move a page to the location of the redirect, tell me which one you want, and I'll do it for you. If you just think it doesn't belong in the Wikipedia, you can list it at Wikipedia:Redirects for deletion. If that doesn't help come talk to me on my talk page some more. moink 22:59, 13 May 2004 (UTC)

Ok, I did the deletions for you. I also did the moves, although I could have left them for you to do. Happy editing! moink 23:02, 13 May 2004 (UTC)

I think that redirect is useful. Someone might look for Indian Institute of Science Bangalore and what they should get is Indian Institute of Science, right? That's exactly what redirects are for. moink 23:09, 13 May 2004 (UTC)

I suggest you list it on Wikipedia:Redirects for deletion then. It's outside my authority as a lone admin to delete it. moink 23:41, 13 May 2004 (UTC)

Tamil vs Malayalam

My roommate speaks Tamil natively and also knows some Malayalam. I'll ask him the difference when I see him next. →Raul654 06:15, May 14, 2004 (UTC)

IIT vs. Indian Institute of Technology

Moved to Talk:Indian_Institutes_of_Technology#IIT_vs._Indian_Institute_of_Technology for greater visibility. Ambarish | Talk 22:55, 21 May 2004 (UTC)

ISO 8601 date format

from the pump

ISO 8601 date format "2004-06-14T05:43Z" is better than "05:43, 2004 Jun 14 (UTC)" for signatures, etc. Rajasekaran Deepak 06:20, 2004 Jun 14 (UTC)

The ISO-8601 formats are lovely for creating computer-readable text, but are not too readable for humans. I believe this argument has been done to death before but sadly cannot recall just where. HTH HAND--Phil | Talk 13:51, Jun 14, 2004 (UTC)

My own preference would be writing all dates in ISO 8601 format and having the software optionally display them differently... but that probably won't happen. Fredrik (talk) 14:47, 14 Jun 2004 (UTC)

Mmmmh, just stating "is better than" seems quite POV. I like integers more, so maybe just the number of seconds since Unix time 0 is better...

Seriously, readability for humans is essential in this project, and ISO8601 means too many alphanumerical chars mixed together. Pfortuny 18:55, 14 Jun 2004 (UTC)

The "T" could be replaced with a space "2004-06-14 05:43Z". Rajasekaran Deepak 00:04, 2004 Jun 17 (UTC)

Why ISO 8601?

1. Widely used with computers and on the internet
2. Lexicographic sort automatically sorts by time

Rajasekaran Deepak 00:04, 2004 Jun 17 (UTC)

Navarathnas

Hi. From your contributions, it seems like you might be able to see if my edits to Navarathnas are correct, and if it should actually be at Navaratnas. Niteowlneils 19:18, 18 Aug 2004 (UTC)

As far as I know, your edits are correct. Moved page to new location, with redirect at old location. A transliteration-to-Latin standard ought to be made for the Brahmi-based scripts. —Rajasekaran Deepak 18:27, 2004 Aug 25 (UTC)

Probably should--you volunteering? ;) All kidding aside, I know I'm not qualified--I know nothing of the language, and was just guessing based on the relative number of google hits for the two spellings. Anyway, thanks for the feedback and for doing the move. Niteowlneils 22:19, 25 Aug 2004 (UTC)

Is not the mean of the standard Cauchy distribution zero?

Is not the mean of the standard Cauchy distribution zero? The Cauchy distribution page says: "The Cauchy distribution is often cited as an example of a distribution which has no mean, variance or higher moments defined". —Rajasekaran Deepak 15:58, 2004 Aug 24 (UTC)

The mean is not zero; there is no mean. If a probability distribution has a density function f(x) then the mean or expected value is

<math>\int_{-\infty}^\infty x f(x)\,dx.\qquad\qquad (1)<math>

Is this the same thing as

<math>\int_0^\infty x f(x)\,dx-\int_{-\infty}^0 x f(x)\,dx\quad\rm{?}\qquad\qquad (2)<math>

If both the positive and negative terms in (2) are finite, then (1) is the same as (2). If either the positive term or the negative term is finite, then (1) is the same as (2). But in the case of the Cauchy distribution, both are infinite. This means (2) is undefined, and then:

• If (1) is construed as a Lebesgue integral, then (1) is also undefined, since (1) is then defined simply as the difference (2) between positive and negative parts; however

• If (1) is construed as an improper integral rather than a Lebesgue integral, then (2) is undefined, and (1) is not necessarily well-defined. We may take (1) to mean

<math>\lim_{a\to\infty}\int_{-a}^a x f(x)\,dx,<math>

and this is its Cauchy principal value, and it is zero, but we could also take (1) to mean, for example,

<math>\lim_{a\to\infty}\int_{-2a}^a x f(x)\,dx,<math>

and this is not zero, as you will see easily if you compute the integral. The various results in probability theory about expected values, such as the strong law of large numbers, will not work in such cases.

Michael Hardy 23:52, 24 Aug 2004 (UTC)

Bounds of (standard deviation divided by mean), given that there are no negative samples

What are the bounds of (standard deviation divided by mean), given that there are no negative samples? —Rajasekaran Deepak 06:30, 2004 Aug 23 (UTC)

The greatest lower bound is zero. I'm going to have to think about the least upper bound.... Michael Hardy 01:55, 26 Aug 2004 (UTC)

OK, simple example: the Pareto distribution whose probability density function is 1/x³ for x > 1, and zero elsewhere, has a finite expected value, but infinite standard deviation. So the least upper bound is infinite. You can't narrow it down more than that. Michael Hardy 01:59, 26 Aug 2004 (UTC)

Wikipedia:Indian wikipedians' notice board

Hi. I would like you to be an active member of Wikipedia:Indian wikipedians' notice board. utcursch 07:36, Dec 29, 2004 (UTC)

Seeking you support

I am seeking your support and participation for starting the "Indian Collaboration of the Week". Please enlist your support on the page Wikipedia_talk:Indian_wikipedians'_notice_board if you would like to support. Thanks Arunram 09:13, 21 Jan 2005 (UTC)