• thundermoose@lemmy.world
    link
    fedilink
    arrow-up
    5
    ·
    2 months ago

    The math here is beyond me, but this statement from the paper seems contradictory:

    The obtained equation is covariant in space–time and invariant with respect to any Planck scale. Therefore, the constants of the universe can be reduced to only two quantities: Planck length and Planck time.

    Planck time is derived from the speed of light and the gravitational constant. So wouldn’t there be at least four universal constants?

    • Mossy Feathers (She/They)@pawb.social
      link
      fedilink
      arrow-up
      2
      ·
      edit-2
      2 months ago

      If a constant is defined by another constant, without a variable between, wouldn’t it be fair to simplify that into a single constant? Additionally, based solely on the article, it almost sounds like they’re inverting that, saying that Planck time and Planck length determine the speed of light and gravitational constant(?).

    • mumblerfish@lemmy.world
      link
      fedilink
      arrow-up
      2
      ·
      2 months ago

      What they are doing is just nonsense. You can use the four normal constants: gravitational, speed of light, plancks constant, boltzman constant, or the Planck ones, also four (time, mass, length, temperature). What they do is just rewrite the G, c and h-bar, the only ones that appear here, in their equations and it turns out just only two appear in the equations. Which two? Planck length and “energy”, where planck energy is a combination of time and mass… so it is still three! All this nonsense to try to say something of no particular interest: if you look at a very small subset of expressions you can probably redefine some constants conviniently to get rid of others.