User talk:Petrus3743

Welcome!

Hello, Petrus3743, and welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Here are a few links to pages you might find helpful:

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Please remember to sign your messages on talk pages by typing four tildes (~~~~); this will automatically insert your username and the date. If you need help, check out Wikipedia:Questions, ask me on my talk page, or ask for help on your talk page, and a volunteer should respond shortly. Again, welcome! The Quixotic Potato (talk) 19:00, 17 January 2016 (UTC)[reply]

Can you add constructions?

Hi I noticed that you added some compass-and-straightedge constructions recently, and while I do like them they are for quite rare constructions, I was wondering could you also add them for the more basic but often used constructions mentioned at Compass-and-straightedge construction#Much used Compass-and-straightedge constructions ( a list I added)

The list is currently:

Constructing the perpendicular bisector from a segment
Finding the midpoint of a segment.
Drawing a perpendicular line from a point to a line.
Bisecting an angle
Mirror a point in a line

Hope you also find these not below your standing , but i do think these are the most used constructions (add others when you find that appropriate). WillemienH (talk) 17:28, 21 June 2015 (UTC)[reply]

Hi WillemienH,

Thanks you for your message! My English is not good anymore. I will endeavor to supplement the above list with a contribution. Maybe I need your help for a good English ... Petrus3743 (talk) 12:58, 28 June 2015 (UTC)[reply]

Marie Serneholt

If you want to, please take a look at this weeks TAFI selected article, Marie Serneholt. Regards.--BabbaQ (talk) 21:50, 11 November 2015 (UTC)[reply]

December 2015

Hello, I'm BracketBot. I have automatically detected that your edit to Heptagon may have broken the syntax by modifying 1 "()"s. If you have, don't worry: just edit the page again to fix it. If I misunderstood what happened, or if you have any questions, you can leave a message on my operator's talk page.

List of unpaired brackets remaining on the page:

language|Greek]]-derived numerical prefix) together with the Greek suffix "-agon" meaning angle).
arxiv/papers/1205/1205.0080.pdf#15 the side of the Heptagon (7) Fig. 15, image on the left side]), retrieved on 4th December 2015</ref>

It's OK to remove this message. Also, to stop receiving these messages, follow these opt-out instructions. Thanks, BracketBot (talk) 11:43, 4 December 2015 (UTC)[reply]

Cite web/book/etc

Hello! Maybe you know this already, but this image shows how you can easily add citation templates like {{cite news}} and {{cite book}}. The Quixotic Potato (talk) 19:00, 17 January 2016 (UTC)[reply]

www.archive.org

Hello again Petrus!

I noticed your message on Talk:257-gon. You are correct, the reference is unreachable. However, I found an archived copy on archive.org. I changed the cite journal template according to these instructions.

Using archive.org is an easy way to find archived copies of webpages or PDF files. Simply copy-paste the URL in the textbox on archive.org (in your case it was: "http://apollonius.math.nthu.edu.tw/d1/ne01/jyt/linkjstor/regular/1.pdf") and press ↵ Enter.

You end up at this page, that contains a calendar. The colored dots on the calendar show you when each archived copy of the page was made. The most recent version that was available was from December 21st.

In this case the URL for the archived version of the PDF is http://web.archive.org/web/20151221113614/http://apollonius.math.nthu.edu.tw/d1/ne01/jyt/linkjstor/regular/1.pdf

Notice how the URL has changed: Archive.org has added "http://web.archive.org/web/" and a date & time in front of the original URL.

By the way, if you ever need some help from someone who speaks German and is a very experienced Wikipedia editor, you can ask user Gerda Arendt. I wish I could explain stuff like this in German, but my German vocabulary is far too limited. The Quixotic Potato (talk) 00:29, 27 January 2016 (UTC)[reply]

Thank you for your editing, and your very good and detailed explanation! I'll try to find this link into similar articles, and I'll perform the correction according to your explanation (as an exercise). By the way, thanks for the link to Gerda Arendt, I'll contact she when needed. Me always help the translation program in the toolbar ... I know unfortunately without good English. Best regards --Petrus3743 (talk) 08:10, 27 January 2016 (UTC)[reply]

Squaring the circle

Thank you for your message. Right now, the diagram is unmotivated and original research. If there is a discussion of the construction on the body of the article (or of approximate constructions), suitably sourced and referenced, and the diagram illustrates the discussion, then it would probably make a great addition. But as an isolated item, it seems problematical. Magidin (talk) 15:23, 14 April 2016 (UTC)[reply]

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Undoing edits

If you undo someone's edit, explain why, unless you just want to piss people off. 95.145.130.35 (talk) 00:22, 7 December 2016 (UTC)[reply]

Sorry, was my mistake. Will not happen again! Greeting from Munich --Petrus3743 (talk) 07:36, 7 December 2016 (UTC)[reply]

On that note here is a link to the posting at bicentric quadrilateral, that you've just deleted while I was answering. You probably have figured out now that the constructions works as described, in any case you can observe/examine it here: [1]--Kmhkmh (talk) 21:21, 1 August 2017 (UTC)[reply]

Yes, unfortunately, I misunderstood the description. Therefore I deleted my erroneous entry again. Thank you for the information. In between I have in commons almost the same construction as you, filed. Petrus3743 (talk) 22:05, 1 August 2017 (UTC)[reply]

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Reverted

Hi Petrus3743,

I wanted to let you know that I've reverted your edits to Angle trisection. I explained my reasons briefly in the edit summary, but I would be very open to discussing further on the article talk page, if you wanted to begin a discussion there.

All the best, JBL (talk) 14:12, 16 May 2020 (UTC)[reply]

Enneadecagon construction

Hi,

I noticed that you have read through this paper and uploaded constructions of the heptagon and tridecagon using Gleason's methods. I was wondering if you could come up with the same type of construction (compass, straightedge, and angle trisector) for a 19-sided polygon, by working out the construction like Gleason did. 97.70.186.205 (talk) 07:52, 22 June 2020 (UTC)[reply]

Hi,

The construction would be possible, but you must not incorporate it into the article without a valid reference! See the example Reverted to Angle Trisection (14:12, 16 May 2020 (UTC)) ... --Petrus3743 (talk) 09:38, 22 June 2020 (UTC)[reply]

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