Dave Richeson @divbyzero
Mathematician. Curley Chair in Liberal Arts at Dickinson College. Author of Tales of Impossibility and Euler's Gem. Now: https://t.co/cefdX8CG6u Carlisle, PA Joined August 2008-
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@wtgowers There's this one I know about: bsky.app/starter-pack-s… My issue with the pack is that although it does feature mathematicians/math teachers, many of them don't post about math (or the non-math to math content is higher than I prefer). So, I've followed some but not all.
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I don't know my plan for Twitter/X. It is hard to give up after all the great people I've met and conversations I had in 13+ years, but the math community has moved to Bluesky. I will use divbyzero.bsky.social as my go-to site for posting math content now. Join us there!
@JDHamkins Thanks. Maybe I'll be back. Ha!
@JDHamkins I agree 100%. However, personally, I want to choose one platform as my go-to. I've been putting off the decision, but I think now's the time (for me) to switch. I'm not stomping off in performative anger, but I did want my followers to know.
@JDHamkins I just did a quick count, and I think I gained about 400 followers in the last week and a half. Again, maybe these are reactionary moves and those new accounts will become dormant. But it feels different to me.
@JDHamkins Maybe it's a temporary post-election blip. But I think a lot of people have left here, never to return. Maybe I'm wrong though!
By the way, I just downloaded all my tweets so I'd have them for the future. It is a huge file, but the interface is pretty convenient. I was worried that X might have discontinued that option. Although all the branding is Twitter, everything downloaded without problems.
New blog post! I used ChatGPT to help me create a Mandelbrot set in Excel! Here are the 30x30, 60x60, and 250x250 versions. I'm also including a few zoomed-in views. divisbyzero.com/2024/11/13/mak…
In case you are moving to Bluebky, you can find me here: bsky.app/profile/divbyz…
@madprofessah All of the images are 250x250 except two in the first tweet (30x30 and 60x60)
These are all screenshots of my Excel spreadsheet! You can download the spreadsheet from my blog.
I guess, now that I've posted this, I realize this isn't *quite* right. If A is 0, then after Z would be BA. If A was 1, then after Z would be A[0].
Some different bases for numbers and who used them. Base 10: Egyptians Base 60: Babylonians Base 20: Mayans Base 2: Computers Base 16: Computers Base 26: Microsoft Excel
Here's a fun little "magic trick." Can you figure out how it works? Hint: even and odd numbers. I was thinking you could roll a die to determine how much to count each time. (I saw the trick was credited to Martin Gardner—true? Source?) youtube.com/watch?v=DaWcL3…
typed in my request and pasted a screenshot of the equation from the article. Within five minutes, it was plotted! I then took a true cardioid, scaled and translated it so it was atop the other heart-shaped curve. As you can see, they are nearly indistinguishable! 4/4
smaller heart-shape is the image of the unit circle under a messy complex map (see below). ams.org/journals/proc/… I wanted to see it with my own eyes, but I didn't want to have to figure out how to graph this beast. So, I asked ChatGPT for the code to graph it in Sage. I 3/4
Here's another neat generative AI example. It is well known, and not hard to show, that the main component of the Mandelbrot set is a cardioid. Looking around the Mandelbrot set, you'll see other cardioid-looking shapes. On the right, you can see the largest one. People who 1/4
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