User talk:Dmitrii Kouznetsov

Welcome!

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Welcome, new editor! We're very glad you've joined us. Here are pointers for a quick start. Also, when you get a chance, please read The Editor Role. You can look at Getting Started for other helpful introductory pages. It is essential for you as an editor to join the Citizendium-Editors (broadcast) mailing list in order to stay abreast of editor-related issues, as well as the mailing list(s) that concern your particular interests. It is also important, for project-wide matters, to join the Citizendium-L (broadcast) mailing list. You can test out editing in the sandbox if you'd like. If you need help to get going, the forums is one option. That's also where we discuss policy and proposals. You can ask any constable for help, too. Me, for instance! Just put a note on their "talk" page. Again, welcome and thank you! We appreciate your willingness to share your expertise, and we hope to see your edits on Recent changes soon. Supten Sarbadhikari 06:34, 16 May 2008 (CDT)

Background colour

Hello, Supten. I could not find the option to change the background color. At my computer, everything appears too dark. I would like to replace background color either to RGB 1 1 1 or to CMYK 0 0 0 0 . Could you help please? Dmitrii Kouznetsov 00:44, 20 May 2008 (CDT)

One solution is to go to the "My preferences" link at the top of the page and choose monobook for the skin instead of the current default skin. Not exactly what you want but it will give you a lighter background. Chris Day 01:48, 20 May 2008 (CDT)

Oh, much better! Thank you, Chris! Dmitrii Kouznetsov 05:58, 20 May 2008 (CDT)

PS: If you leave a message for someone on your own talk page, they may not see it unless they happen to look at your talk page, or notice it on 'Recent Changes'. Better to leave them on the other person's talk page... :-) J. Noel Chiappa 07:50, 20 May 2008 (CDT)

Dear Noel. Thank you for the suggestion. I should post there if anything urgent. But I post here questions for those who read the 'recent changes' (or are interested in my activity).

I upload pics in formats jpg, gif, png. They are difficult to write, almost imposible to correct errors, have poor resolution and are slow to load. I tried to upload eps figure, but got the following mesage: ".eps" is an unwanted file type. List of allowed file types: png, gif, jpg, jpeg, ogg. What do I wrong? Dmitrii Kouznetsov 20:09, 21 May 2008 (CDT)

name for code

Hi Dmitrii i moved that page to something without the http hereTetrationAsymptoticParameters00. It might be better on the CZ:Code subpage (as you can see we have not really got the code pages going yet, see a brief summary here: CZ:Subpages#Non-text_media ) of an article, which would this go with in the form of Article name/Code/TetrationAsymptoticParameters00? Or maybe I am misunderstanding the role for this page? Chris Day 08:56, 23 May 2008 (CDT)

Thank you, Chris. Name for that pic looks fine. Please, look also at . The source (code) is inside. Sould we extract the code into a separate file? Dmitrii Kouznetsov 09:53, 23 May 2008 (CDT)

P.S.Chris, please, look at CZ:Code. I fill it according to my understanding of your message. Dmitrii Kouznetsov 19:58, 23 May 2008 (CDT)

Code submission

Dmitrii, I opened a discussion http://forum.citizendium.org/index.php/topic,1742.0.html on code submission. For obvious reasons I like to hear your opinion, too. --Paul Wormer 09:47, 27 May 2008 (CDT)

Timeline in biography

Hi Dmitrii, according to the biography section of your user page, your Ph.D. was awarded two years before graduation. Is that so, or possibly a typographical error? ... Peter Lyall Easthope 08:55, 30 September 2008 (CDT)

Thank you, Peter. I just corrected 1978 to 1988. Dmitrii Kouznetsov 16:26, 3 October 2008 (CDT)

categories at citizendium

Hi Dmitrii, good to see you back. Before you put more time into categories I should warn you that we do not use categories in the same way as at wikipedia. All the categories are placed on the articles by the subpages template based on the information in the metadata template. In short there should be no categories on any pages.

Instead of hierarchial category trees we develop the Related Articles subpage to be used as a navigation aid. It would be possible to start a subgroup on mathematical functions. One example of a subgroup can be seen at CZ:Chemical Engineering Subgroup. Let me know if you need more info. Chris Day 03:07, 31 October 2008 (UTC)

Hi, Chris. I do need more information. If I go to CZ:Chemical Engineering Subgroup, I see only the name in curly bracket.. I want to have some place where other mathematical functions are listed; at least to cite them correctly. Where is the list? Could you type/copypast the instruction/(link to the instruction) in category or CZ:Category to explain the use? Dmitrii Kouznetsov 03:38, 31 October 2008 (UTC)

How about CZ:Dogs Subgroup, there is more content there. That is like a home page for users that have a common interest, there are set set rules about how it should be formatted. As for the Chemical engineering one, click on some of the options in the table (most interest for you will be all articles) and you'll see that a subset of articles in engineering are identified. Same for the Dog Subgroup. Note that they also have categories at the bottom of the article to note it is a member of a subgroup. An article can be in three different subgroups; you need to add the subgroup to the Sub1 field in the articles metadata. A subgroups is not restricted to articles within one workgroup in can cross boundaries as well as being a subset of one workgroup. In general these are not like categories in wikipedia but small working groups for authors with a common interest. For hierarchial grouping we use the Related Articles Subpages. Chris Day 12:30, 31 October 2008 (UTC)

The idea here is that categories are not meant for navigation but for organization. In other words, categories are not for people reading Citizendium but for people editing Citizendium. One function for categories here is to collect pages that belong to a Workgroup. For instance, all mathematics articles are in Category:Mathematics Workgroup. So, if you want to check all the changes to mathematics articles (something I do regularly), you can go to that category page and click on the related changes link. Subgroups are an extension to that and can be used if the workgroup grows too large, or if there is a field (like Chemical Engineering) which does not fall nicely in our division of workgroups. In this case, I do not see the need for a Special Functions subgroup; we do not have enough editors working on special functions.

A list of functions is something that a reader could use, so we don't use categories for that. There are two possibilities here to get a list of functions. Function (mathematics)/Related Articles could contain a list of functions with their definitions. For an example, see Category theory/Related Articles which contains a (very incomplete) list of categories; for explanation, see CZ:Related Articles. The other possibility, in case you want to add more information than just the definition, is to use a catalog; in this case we have Catalog of special functions. Cheers, Jitse Niesen 12:50, 31 October 2008 (UTC)

Where are hidden indications of categories? Where to add

• Mathematical functions [r]: Add brief definition or description to specify that

logarithm, tetration and Dirichlet function are namely mathematical functions? Dmitrii Kouznetsov

Your edits at logarithm

Dear Dimitrii. Thank you for your efforts on our article about the logarithm. However, I am afraid that I do not really like the new first paragraph you wrote at logarithm. Citizendium does have some different standards than Wikipedia, and one point where they differ is that Citizendium places more emphasis on making the article easy to understand for non-specialists. See for instance the first section of CZ:Article Mechanics Complete, called "The nature or purpose of an encyclopedia article". The first paragraph you added is:

"Logarithm or log, is mathematical function, inverse of exponential function, holomorphic in the whole complex plane, except singularity at zero and cut at the negative part of the real axis. Roughly, logarithm of number $z$ on the base $b$ counts, how many times the base $b$ should be multiplied by itself in order to get $z$. However, this function can be extended to non-integer values of $z$: real, complex, matrices, etc."

Many people are able to understand the idea of logarithms; after all, it's taught at high school. However, the first sentence acts as a huge barrier to those people because it requires knowledge of complex analysis. It is written at a too advanced level. So, I moved the analyticity of the logarithm further down, when we are talking about the complex logarithm, and I removed the rest, because it basically repeats what the next paragraph says.

Your discussion of single-valued versus multi-valued is clearly an improvement. This was sorely missing in the previous version. -- Jitse Niesen 13:43, 31 October 2008 (UTC)

Categories and Log

Thank you, Jitse, for the explanation about categories and logarithms. I looked at dogs. Perhaps, we should begin with more basic category of functors, formulating the articles in the commonly understandable way. As for logarithm, I would suggest to leave in the preamble the short sentence" Logarithm or log, is mathematical function, inverse of exponential function." Then, the numerical examples should be in the section "examples", and there should be section "definiitons". Dmitrii Kouznetsov 07:08, 1 November 2008 (UTC)