sparseMatrix

@realcaseyrollins

I mean, there’s a lot of motivation to not do anything with twitter but stay away from it

@inkican

Babylon 5 was the show I wanted to like, knew I was supposed to like, was literally made for me by people who’s work I freaking loved elsewhere; but as much as I wanted it to, it just never really spoke to me.

@inkican

Dark matter looks like nothing, because that’s what it is. Euclid will see a lot of things, but not dark matter. It is not a substance, it is a descriptive term for a breakdown in Newton-Einstein Gravitational Dynamics.

The new dynamic is the Milgromian Gravitational Dynamic.

https://scitechdaily.com/conclusive-evidence-for-modified-gravity-collapse-of-newtons-and-einsteins-theories-in-low-acceleration/?expand_article=1&expand_article=1

Incidentaly, this is not science fiction.

@Sodis

@readbeanicecream @exscape

According to my understanding, beyond the event horizon, gravity is infinite.

I am not a physicist - I’m a guy who read Prof. Hawking. Given the nature of llight vis a vis observation, inside the singularity, mass and gravity approach infinity.

Mass bends spacetime into gravity. Gravity bends light. Infinite mass > infinite gravity > stops light == singularity.

Note that things happening near the singularity are not the same as things that happen beyond the event horizon.

@exscape

@readbeanicecream

Also Idk what you are talking about nobody believing there’s an actual singularity; I don’t know what else you think is happening, or of what use the mathematics might be if it doesn’t approach some degree of accuracy as concerns the physical character of the phenomena

@FfaerieOxide

@readbeanicecream @exscape

Thank you for linking that! I knew I had read that they could be, but I couldn’t recall where. It might not have been Scientific American, but that’ll do XD

While clearly they can be, infinity == infinity is still true, If I recall.

Also, I’ve got some simple problems with that crate analogy, Scientific American or not; any crate with an infinite number of anything inside it cannot be emptied, it’s in the very definition of infinite. Consequently, neither crate will ever empty and the pairing will be an infinite pairing of apples and oranges.

@exscape

@readbeanicecream

A couple examples of manifolds:

• exhaust manifold on combustion engine takes raw cylinder exhaust gases in pipes that all come down and combine into a single larger pipe that connects to the input of a catalytic converter.

• the plenum in your attic is a manifold. One big duct runs from your air handler into a box with several ducts coming from it, delivering air to each of the vents. the ducts and the plenum form a manifold.

In literature, it means ‘many and various’.

In mathematics, “a collection of points forming a certain kind of set, such as those of a topologically closed surface or an analog of this in three or more dimensions”

In Kantian philosophy, “the sum of the particulars furnished by sense before they have been unified by the synthesis of the understanding”

Origins: Old English manigfeald ; current noun senses date from the mid 19th century.

All from the wikipedia

They all have some descriptive relevance, but the one that really counts for us is the math one, suggesting the closed surface.

It wouldn’t surprise me though if it still worked; there are many examples of topologically closed surfaces that can still be traversed, if in unexpected ways. I’m thinking of another manifold, the klein bottle, and of course the mobieus strip.

@kjr

Not helping much here in Texas, though.

@exscape

@readbeanicecream

By definition, a manifold has a place where things go in, and other things come out. So yes, it does in fact logically follow. If its a manifold, then it logically follows that what goes in comes out.

You’re saying we know a bunch of stuff I’m not certain we know.

My understanding is that by definition, the singularity has infinite mass and infinite gravity, so there is no way it can gain mass; because infinity + 1 = infinity. It’s the very nature of infinities. You can have a number of infinities, but manipulating them arithmetically always yields infinity. 2 x infinity = infinity. 3 / infinity = infinity.

Like zero, it is more identity than number. 0 = nothing, infinity = everything.

So if you hope to have me follow your narrative, you’re going to address this assertion concerning increasing the mass of black holes first.

@kjr

can’t happen fast enough or cheap enough.

@readbeanicecream

I’m no authority, but I love this stuff. I read Dr. Hawking’s book “A Brief History of Time”, and it was not problematic for me.

My takeaway is that a black hole is a sort of manifold. It would follow that if there is a way into it, and stuff going into it, the stuff must be coming out somewhere.

The question is where that stuff comes out, and in what form, and when, in it’s local time frame.

I had always envisioned this hypothetical ‘other side’ as a white hole. It seems like, since we haven’t observed any white holes, that the exits must be elsewhere.

@realcaseyrollins

No doubt they’ll kill it off as soon as it sees any sort of adoption