S10E22 “They Saved Lisa’s Brain”

  • Skvlp@lemm.ee
    link
    fedilink
    English
    arrow-up
    0
    ·
    edit-2
    6 months ago

    Since it’s useless to post links like this without an AI summary:

    Physicists report the possibility of the universe having a complex, doughnut-like geometry, challenging the belief in its trivial topology.

    Topology

    The universe may have nontrivial topology, similar to a doughnut, allowing for travel across the cosmos and ending up back where you started.

    Research

    Scientists have searched for signs of complex topology in the cosmic microwave background, but have not found evidence yet.

    New Study

    A new study evaluated 17 possible nontrivial topologies for the cosmos, finding that most of these topologies have not been ruled out.

    Future Analysis

    Future analyses of the cosmic microwave background could reveal hints of complex topologies, and machine learning techniques may be required for computational challenges.

    Motivation

    There is motivation to look for nontrivial topology as some features of the cosmic microwave background hint at asymmetry, which could be explained by nontrivial topology.

    Further Research

    Scientists plan to hunt for signs of nontrivial topology in upcoming data from surveys of the distribution of galaxies in the cosmos.

    • sus@programming.dev
      link
      fedilink
      English
      arrow-up
      0
      ·
      6 months ago

      this summary doesn’t have some information that is pretty critical if you want to compare it to the meme

      Searches for that simple 3-torus have come up empty. But scientists haven’t yet searched for some 3-torus variations. For example, the sides of the cube might be twisted relative to one another. In such a universe, exiting the top of the cube would bring you back to the bottom, but rotated by, for example, 180 degrees.

      So to ruin thine dreams, a summary:

      Season 10 was in 1998

      A “donut-shaped” universe (3-torus) was proposed in 1984 (the paper also points out it’s the simplest finite 3d topology, so it’s probably been considered even earlier)

      This article talks about more complicated “donut shapes” that haven’t been ruled out before

  • Ð Greıt Þu̇mpkin@lemm.ee
    link
    fedilink
    English
    arrow-up
    0
    ·
    6 months ago

    For those curious, the donut shaped universe shown isn’t what the theoretical universe model actually looks like,

    What it represents is an “asteroids like” geometry of a two dimensional universe where exiting one “side” brings you to a corresponding point on the other.

    The proposed donut geometry of the universe is what’s called a 3-roid or 3-tauroid, which is basically the same idea as the asteroids like 2D universe but for a prism instead of a rectangle. Meaning that our ability to return to the starting point is based on the fact that we are moving along a 3-D “surface” of a 4th dimensional object, the way the Asteroids ship loops back to the start by moving across the 2-dimensional surface of a 3-D geometry.

    Part of me wonders if this means that the actual boundaries of the universe are at 0+ and 0- along the W/A axis in 4-D space, and if that means that every character who has some power related to moving in 4-D space would actually just fall out of space and time if they ever tried using their abilities for real.

      • lobut@lemmy.ca
        link
        fedilink
        English
        arrow-up
        0
        ·
        6 months ago

        I asked ChatGPT to explain it to me and it came up with this:

        This description is discussing a theoretical concept where the universe is shaped like a donut, known as a “3-roid” or “3-tauroid”. In this model, moving through the universe is akin to navigating a 3D surface of a 4D object, similar to how a spaceship in a 2D video game wraps around when reaching the edge of the screen. The suggestion of characters with 4D movement abilities falling out of space and time is a speculative idea based on this theoretical framework.

        • SkyezOpen@lemmy.world
          link
          fedilink
          English
          arrow-up
          0
          ·
          6 months ago

          I told chatgpt to go fuck itself and it came up with this:

          This content may violate our usage policies.

        • variants@possumpat.io
          link
          fedilink
          English
          arrow-up
          0
          ·
          6 months ago

          So a donut just like in the picture? Homer was rights the earth isn’t flat but donut shaped

          • deo@lemmy.dbzer0.com
            link
            fedilink
            English
            arrow-up
            0
            ·
            6 months ago

            to me at least, the picture made it look like the galaxies and stuff were inside the “bread” of the donut, as opposed to being “frosting” on the surface.

    • TheObviousSolution@lemm.ee
      link
      fedilink
      English
      arrow-up
      0
      ·
      6 months ago

      I forgot about this paper, but I am toying with a spacetime hypothesis where it and your notes are on point. Well, except for the end.

    • Sanctus@lemmy.world
      link
      fedilink
      English
      arrow-up
      0
      ·
      6 months ago

      If its anything like moving on the z axis of a 2D game you just will seem to pop out of existence or you’ll draw over other people and objects.

    • edgemaster72@lemmy.world
      link
      fedilink
      English
      arrow-up
      0
      ·
      6 months ago

      I think they covered what happens when you get to one side of the universe and keep going in a different episode

      • Danitos@reddthat.com
        link
        fedilink
        English
        arrow-up
        0
        ·
        6 months ago

        Fun fact: 1782¹² + 1841¹² = 1922¹² is an incorrect equation, per Fermat’s last theorem.

        They put that equation there because some of the writers of the episode have a mathematical background, and they knew it was wrong, but the error is so relatively small that if someone writes that in a normal calculator they’ll get the equality. So basically an easter egg for someone that knows about Fermat’s last theorem.

  • Buddahriffic@lemmy.world
    link
    fedilink
    English
    arrow-up
    0
    ·
    6 months ago

    When they say the universe “may have” a complex geometry, is this speculation about what’s possible or based on some evidence that suggests this is the case instead of the simpler “it’s just 3d space plus time with all extending outwards in each direction that we are already aware of”?

    Don’t get me wrong, I love me some speculation about what other realities would fit in with what we’ve observed, but actual evidence would be more cool, especially given that I don’t even know what such evidence would even look like, other than being able to see ourselves in some far off direction (though even then, I’d wonder how we could be sure it’s actually us and not some others that just look just like us and happen to do the same things at the same time).