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Cake day: July 9th, 2023

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  • My favourite black hole fact, coming from the character of the space-time tensor and how it changes, is that as you approach a black hole, time goes sideways.

    I don’t think my lecturer put it quite that way, but he showed that as you get close, the time dimension comes to look like a space dimension in the tensor, and the space dimension that points into the black hole, looks like a time dimension!








  • How did Arch get this bad rep?

    Because so many people love it and make a point of its ‘brilliance’, so it’s funny to take it down a peg.

    Myself, long ago, I moved from Arch to Ubuntu partly for ease of downloads on bad internet in Asia (in-country package mirror, and obviously less downloads overall); and partly because I didn’t want my time and mental energy to be ‘on call’ for a random breakage from an upgrade. Breakages were occasional for me, and normally easily fixable, but took immediate time and effort.

    I still think Arch is great, but I’ve got through some distro hops to end up currently on Mint, from wanting stability + a couple of binaries that are published for Ubuntu and not other distros.

    Was tempted by NixOS or Guix, but… not just yet.






  • First one that got me was the black hole. If I dig a hole in the ground, is that not really a hole? If I find a hole in your logic is that not a hole? If I model the flow of charge with positive ‘holes’ between electrons, are they not holes? And… do people really commonly think a ‘black hole’ is a traditional sort of hole? ‘Hole’ seems a perfectly reasonable name for what it really is.

    Now what a black hole really is is fascinating stuff, but not in a “see, people are so ignorant to think it’s a hole” kind of way.