This is interesting because the most “realistic” (i.e. still not realistic) depictions of time travel in fiction involve travelling through a singularity or wormhole. So you probably have to be in space to start with, but also both ends of the wormhole have mass so they can be orbiting a planet or star and stay within a stable distance of it. It solves this particular problem (just leaving the other usual problem of causality!) It also proves your point since it does allow travelling in space, in fact it allows travelling faster than light.

I think the converse is true as well, that if faster than light travel is possible then time travel must be possible, at least if you take relativity at face value. As others have pointed out there’s no universal reference frame, and for any journey that is faster than light in one reference frame, there is another frame in which the journey goes backwards in time.

I’d caveat this by saying more signals is best done with two lanes. For two-way single-lane track you need everything in one signalling block to avoid gridlocks

Two lanes everywhere is the simplest and most conventional solution for this. But I might be tempted to just make the big loop one-way and turn it into a massive roundabout

This post has a list of casual communities which might help: https://lemmy.world/post/2216085

https://en.m.wikipedia.org/wiki/Goodstein's_theorem

Not sure exactly what the question is but I’m fairly sure the answer is yes. 😀 Anyone can start a Lemmy/Mastodon instance and anyone can create new software that federates with it.

The orangutan looks happy. Bet that is fun

https://slrpnk.net/ comes to mind

My understanding is that this headline has been pretty much accepted as official by biologists for some time now, to the point where “non-avian dinosaurs” has become a common term for the extinct animals. So it’s totally correct to say things like “I’m just going to the park to feed the dinosaurs”

This looks great!

Doesn’t have the “updates” part, but there is !bestoflemmy@lemmy.world

Welcome!

Welcome, glad you could join us! And you have a pot of tea already. Hope settling in goes ok when you arrive.

Feddit UK post about this

The admins are hopeful at the moment that we will be able to comply without too much trouble

Not an expert but I’d guess that is Tycho crater, and the stripes are called its ray system https://en.wikipedia.org/wiki/Ray_system

Nice work!

You could say something like “the image of exponentiation over…” to mean the set of values created by applying the function once, but it sounds slightly clunky.

Looks like there aren’t really very many sets of mostly transcendental numbers that have names. Computational numbers and periods are two of them, I’d guess that both probably contain your set, so you could compare with those to see where it gets you.

Fun question! I don’t know the answer other than to say it’s not just the algebraics because of the Gelfond-Schneider constant

Are you sure this is well-defined? You say that a and b are algebraic but “closure” implies that they could also be any members of S. This might mess up your proof that it’s not all the reals if you do mean the closure.

I remember reading that the transporter was added to TOS mainly to speed up storytelling, with the technobabble behind it being expanded on later. Then replicators/holodeck put in TNG because it made sense based on similar technology. So basically you’re exactly right, it is magic