User talk:Goodphy

Welcome!
Hello, Goodphy, and welcome to Wikipedia! Thank you for your contributions, especially your edits to Ground loop (electricity). 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 Questions, ask me on my talk page, or, and a volunteer should respond shortly. Again, welcome! ~Kvng (talk) 15:31, 18 January 2016 (UTC)

About the image of the SR NOR latch
Hello, Goodphy! I think there is a mistake in the image you've added to the Flip-flop article: Should not the description of the last state reads (R,S) = (1,1) instead of (R,S) = (0,1)? Abd.nh (talk) 07:54, 22 December 2020 (UTC)

Having slope
Regarding, see Google Books "having slope". - DVdm (talk) 09:55, 27 December 2020 (UTC)

Ring theory pages
Hello, Goodphy! I know you mean well, but it really isn't helpful to add things like the meaning of the symbol 0 and the identity 0a=a to pages about other ring theory topics. These things will just make an article harder to read, because the main points will be surrounded by all these other statements that readers of the page likely already know. If you want to reply, you can reply here on this page, since I am temporarily watching it. Or you can simply delete my message after reading. Best wishes, Ebony Jackson (talk) 23:33, 21 February 2021 (UTC)

Convex function
I'm pretty sure you've got your up and down, or concave and convex, reversed. Can you say what sources support? Dicklyon (talk) 02:59, 23 March 2021 (UTC)

Nevermind; I see the Hamming ref and some others agree with you. Dicklyon (talk) 03:02, 23 March 2021 (UTC)


 * , I did this and then this. Hope you don't mind . Cheers - DVdm (talk) 10:38, 23 March 2021 (UTC)

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December 2022
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July 2023
It appears that you have been canvassing—leaving messages on a biased choice of users' talk pages to notify them of an ongoing community decision, debate, or vote—in order to influence Extreme ultraviolet lithography. While friendly notices are allowed, they should be limited and nonpartisan in distribution and should reflect a neutral point of view. Please do not post notices which are indiscriminately cross-posted, which espouse a certain point of view or side of a debate, or which are selectively sent only to those who are believed to hold the same opinion as you. Remember to respect Wikipedia's principle of consensus-building by allowing decisions to reflect the prevailing opinion among the community at large. Thank you. — Diannaa (talk) 14:19, 20 July 2023 (UTC)

Two minor optics quibbles
Hi Goodphy. I've seen many of your recent edits to optics articles, and noticed two things I wanted to point out to you. This edit has both of them. Srleffler (talk) 19:03, 19 August 2023 (UTC)
 * A lens has only one aperture stop, and the entrance and exit pupils are images of it. It is misleading to say that the entrance pupil is "the image of an aperture". It is the image of the aperture stop. A lens can have many apertures within it, but there is only one aperture stop, and only one entrance pupil.
 * It isn't really necessary to emphasize that the image formed at infinity is to the right or to the left. It is neither. When we say that a lens forms an image at infinity this is the same as saying it does not form an image anywhere. The rays are parallel; no image is formed at any finite distance but you can treat the parallel rays as if they formed either a real image at +infinity or a virtual image at -infinity; it's all the same, physically.


 * Hi Srleffler. Thank you to provide a good advice. For the first advice (an aperture to the aperture stop), I accepted your advice. For the second advice, I still believe that the location of pupils at the left or the right (even if they are at infinity) is better to be mentioned for straightforward visual understanding of telecentricity. Your point may be obvious for you, but I believe it is not for others, especially newcomers in optics. Goodphy (talk) 08:14, 20 August 2023 (UTC)
 * I understand your point. I might try to find wording that avoids describing it as an "image at infinity" altogether, if I can do so without making it more confusing.--Srleffler (talk) 17:59, 20 August 2023 (UTC)

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Nomination of Proofs of elementary ring properties for deletion
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Updating images
Hi Goodphy. I noticed that you uploaded several different image files while refining the image for Entrance pupil, eg File:Entrance pupil - 3, 2024-07-18.png and File:Entrance pupil - 4, 2024-07-18.png. You don't have to create a new image page with a new name each time you want to make a minor update. If you go to the image's page on Commons (eg ) and scroll down to the "File History" section, there is a link there that says "Upload a new version of this file". The new file you upload will replace the old one and articles that are using the image will automatically use the new version. -- Srleffler (talk) 05:16, 21 July 2024 (UTC)

Nice work on that diagram by the way.--Srleffler (talk) 05:17, 21 July 2024 (UTC)