collinsmark's latest activity
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collinsmark replied to the thread Today I Learned.Here's a related video by Matt Parker's Stand-up Maths. (Most people on PF are familiar with Matt Parker from his semi-comedic, math... -
It's also worth mentioning that, although ## \Sigma x_n - \Sigma y_n ## and ## \Sigma( x_n - y_n )## are mathematically identical...
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My gorgeous cat again :smile:. (Lens: Yashica ML 50mm f/1.7)
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Well, English has a a few instances where confusion results from such things. I've never kept track of them but have noticed a few over...
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https://english.elpais.com/technology/2025-08-03/chatgpt-dissidents-the-students-who-refuse-to-use-ai-i-couldnt-remember-the-last-time-i-...
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collinsmark reacted to Stavros Kiri's post in the thread Stargazing Solar Activity and Space Weather Update thread with
Like.
For Sept. 15, 2025 STRONG EQUINOX STORM: Last night, a strong geomagnetic storm pushed auroras deep into the USA, with sightings as far... -
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Our garden (middle, most private part: where no roads can be seen, anywhere around:smile:) (we just leave the molehills alone. Given...
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Guess what happened.
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Did anyone else do this? I eliminated our names but it is genuine.
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Saturday night seafood soup and salad
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