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Welcome!

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Some cookies to welcome you!

Welcome to Wikipedia, SergeyLiflandsky! Thank you for your contributions. I am Frood and I have been editing Wikipedia for some time, so if you have any questions feel free to leave me a message on my talk page. You can also check out Wikipedia:Questions or type {{help me}} at the bottom of this page. Here are some pages that you might find helpful:

Also, when you post on talk pages you should sign your name using four tildes (~~~~); that will automatically produce your username and the date. I hope you enjoy editing here and being a Wikipedian! Frood 23:55, 23 July 2015 (UTC)[reply]

SergeyLiflandsky, you are invited to the Co-op!

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Co-op logo
Hi there! SergeyLiflandsky, you are invited to The Co-op, a gathering place for editors where you can find mentors to help you build and improve Wikipedia. If you're looking for an editor who can help you out, please join us! I JethroBT (I'm a Co-op mentor)

This message was delivered automatically by your robot friend, HostBot (talk) 17:40, 27 July 2015 (UTC)[reply]

Your recent edits

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Information icon Hello and welcome to Wikipedia. When you add content to talk pages and Wikipedia pages that have open discussion (but never when editing articles), please be sure to sign your posts. There are two ways to do this. Either:

  1. Add four tildes ( ~~~~ ) at the end of your comment; or
  2. With the cursor positioned at the end of your comment, click on the signature button ( or ) located above the edit window.

This will automatically insert a signature with your username or IP address and the time you posted the comment. This information is necessary to allow other editors to easily see who wrote what and when.

Thank you. --SineBot (talk) 14:47, 29 September 2015 (UTC)[reply]

Proofs

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Inclusion of proofs on Wikipedia are discouraged, per Wikipedia:WikiProject Mathematics/Proofs. The reasons for possible inclusion include:

  1. The proof, itself, is famous.
  2. The proof uses an interesting technique (which isn't used in another proof elsewhere in the article).

Most of the proofs you have added are only slightly different from other proofs already in the articles.

Try Wikibooks. — Arthur Rubin (talk) 16:05, 29 September 2015 (UTC)[reply]

See WT:MATH#Proofs, revisitedArthur Rubin (talk) 17:58, 29 September 2015 (UTC)[reply]

July 2021

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Information icon Hello, I'm Anita5192. I wanted to let you know that one or more external links you added to Quadratic equation have been removed because they seemed to be inappropriate for an encyclopedia. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page, or take a look at our guidelines about links. See also Wikipedia:YOUTUBEAnita5192 (talk) 15:24, 26 July 2021 (UTC)[reply]

@MathPhysicsEngineering

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Hi SergeyLiflandsky, could you take a moment to describe your connection to the @MathPhysicsEngineering YouTube channel you're promoting? ~ ToBeFree (talk) 21:33, 13 December 2022 (UTC)[reply]

Managing a conflict of interest

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Information icon Hello, SergeyLiflandsky. We welcome your contributions, but if you have an external relationship with the people, places or things you have written about on Wikipedia, you may have a conflict of interest (COI). Editors with a conflict of interest may be unduly influenced by their connection to the topic. See the conflict of interest guideline and FAQ for organizations for more information. We ask that you:

In addition, you are required by the Wikimedia Foundation's terms of use to disclose your employer, client, and affiliation with respect to any contribution which forms all or part of work for which you receive, or expect to receive, compensation. See Wikipedia:Paid-contribution disclosure.

Also, editing for the purpose of advertising, publicising, or promoting anyone or anything is not permitted. Thank you. ~ ToBeFree (talk) 21:33, 13 December 2022 (UTC)[reply]