User talk:Cj67
Welcome!
Hello, Cj67, and
- The five pillars of Wikipedia
- If you need help, post a question at the Help Desk or ask me on my talk page.
- Sign your posts on talk pagesusing four tildes (~~~~).
- Provide an Edit summary
- Take a look at Consensus of standards. It is always wise to read the talk page of an existing article before making major changes on it. Even then, I typically ask if anyone minds that I make a change. Very often they do! ;-)
- Create a User page
Again, welcome! And if you have any questions, please do not hesitate to ask. --CTSWyneken 23:59, 29 May 2006 (UTC)(talk)
Speed of gravity
Welcome to to the organized chaos that is Wikipedia. Kindly be advised that your edits to speed of gravity have been reverted for the reasons described on talk:speed of gravity. Kindly feel free to read the prior discussions and to weigh in on the issue of mentioning TVF in that article. You will not be permitted to unilaterally remove that content, but I am happy to listen to your reasons for wanting it removed. Given a good case that myself and another editor can comfortably get behind and defend, that mention will become history. --EMS | Talk 03:14, 3 June 2006 (UTC)
Annihilation theorem on open set
Hi,
so this is the place you said right?
His proof, which was a very very hasty sketch went along these lines :
let f be
he said, consider the functions
now convolve :
if goes to zero, it is known that becomes an approximation of unity under convolving that should give the result
But is this really okay? Doesn't convolving require the function to be defined everywhere at first?
Thanks, Evilbu 18:18, 11 June 2006 (UTC)
- OK, a couple of things. First, needs to be defined a bit more carefully, but no big deal, you can show it converges (in the sense of measures or distributions) to the Dirac. But, this begs the question a bit, because this means convolving with continuous functions works. Proving that it works with functions requires the kind of approximation that I was describing earlier. And, you don't need things to be defined everywhere, since convolving is defined in terms of integration, which doesn't see sets of measure zero. (Cj67 21:12, 11 June 2006 (UTC))
R^n is an l^p space
Lebesgue spaces can be defined on any measure space. A Lebesgue space on a measure space S with counting measure is the space . In the case that S = N, the set of natural numbers, the standard space is obtained. In the case that S = n, the set with n elements, the space Rn with its p-norm is obtained. -
- From this, you agree that R^n is not l^p, though it is L^p for a certain measure. (Cj67 15:26, 19 June 2006 (UTC))
- No, I don't quite agree. is, by definition, with the counting measure. Since is where is the set with n elements and its counting measure, we conclude that according to the definition, is an space. In particular, it is . It is the space of sequences of length n. Rn with its p-norm is indeed an space, though it is not the standard space of sequences of countable length. R^n is not standard l^p, but it is some l^p space. Your wording makes it sound like you think there is only one space, but there are many. -talk + 15:34, 19 June 2006 (UTC)]
- No, I don't quite agree. is, by definition, with the counting measure. Since is where is the set with n elements and its counting measure, we conclude that according to the definition, is an space. In particular, it is . It is the space of sequences of length n. Rn with its p-norm is indeed an space, though it is not the standard space of sequences of countable length. R^n is not standard l^p, but it is some l^p space. Your wording makes it sound like you think there is only one space, but there are many. -
Edit summary
Hi. Just a reminder, it is good if you use an
The preview button is a good thing too. :) Oleg Alexandrov (talk) 20:51, 24 June 2006 (UTC)
- Yes, I am aware of both. I guess I made a mistake on some page, so I should have previewed? On what page? (Cj67 20:57, 24 June 2006 (UTC))
- Never mind about the preview. You were making a lot of edits at Sobolev space but only later I realized it was in different sections. The edit summary comment is valid though. :) Oleg Alexandrov (talk) 20:58, 24 June 2006 (UTC)
Sobolev space
I am sure you know about these things more than me, but are you sure about the phrase:
- is the space of absolutely continuous functions
Why is "loc" there? Oleg Alexandrov (talk) 20:54, 24 June 2006 (UTC)
- E.g., the constant function 1 is not , but it is . But, you are right, loc isn't correct either. (Cj67 20:58, 24 June 2006 (UTC))
- OK, I leave it up to you to sort that out. :) Oleg Alexandrov (talk) 21:06, 24 June 2006 (UTC)
CfD
Check this out: [1] bunix 02:01, 14 October 2006 (UTC)
culminated in
Yeah, didn't you see South Park? We're all atheists now. Hail Science! — coelacan talk — 03:30, 12 December 2006 (UTC)
Please more productive edit summaries
Dear Cj,
Please provide edit summaries on Religion that describe the neutral reason for the edit and not ones like "remove silly fluff". I reverted your recent change because "way of life" however ambiguous you may think it sounds is a very common comparative descriptor of religion. Perhaps there are other reasons for making the change you made, but calling this "silly fluff" is wholly unproductive.PelleSmith 21:01, 13 March 2007 (UTC)
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