sparseMatrix

1

sparseMatrix @kbin.social 3y ago

@djidane535

Actually, it took a minute to sink in, but that is very helpful. Thanks for enduring my morning dimness :D

2

sparseMatrix @kbin.social 3y ago

@djidane535

Interesting but not really helpful. I found something in a recent FAQ that says I should add an article instead of a post, but the option to add an article is not on the menu on my instance, as it is in their screenie

Also I'm a mastodon user, and my account there is the focus of my microblogging activity. The user there follows this account, so my posts here, show up there. The short story is, the microblog here is essentially a right pain in my ass.

At least now I know what it is.

sparseMatrix @kbin.social 3y ago

1

sparseMatrix @kbin.social 3y ago

@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.

sparseMatrix @kbin.social 3y ago

@explodingkitchen

My gut reaction when I first heard this story break was simply 'Giuliani'.

1

sparseMatrix @kbin.social 3y ago

@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

sparseMatrix @kbin.social 3y ago

@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.

sparseMatrix @kbin.social 3y ago

@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.

9

sparseMatrix @kbin.social 3y ago

@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.

11

sparseMatrix @kbin.social 3y ago

@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.

2

sparseMatrix @kbin.social 3y ago

@kelvin0mql

I do not question any of that. My point is, the republican party has been stirring this pot a long time, and as long as the money keeps pouring, they cant be arsed, as the brits say.

It's got to be stopped at the source. We're already at the point that guys are like this everywhere. One stands in the foyer of the Kroger just about every afternoon 3 blocks from my house.

Wearing a ball cap with a thin blue line flag, armed to the teeth, in a flag-wrapped t-shirt, glaring at anyone who walks by with a smile their face.

His body language, the sidearm he's wearing, his clothes - it all screams that if you're aren't mad as hell and not going to take it anymore, you must be a fuckin' democrat.

That is a feature of the republican party. If it isn't addressed soon, some sort of war will be the only way it gets addressed.

4

sparseMatrix @kbin.social 3y ago

There are a lot of people who would like you to think that disinformation is harmless; that if you buy into bullshit that it's your own fault; and that the 'people that matter' know the truth.

This man bought into the fire hose of shit that is continuously, endlessly spewing a mixture of exaggerations, half truths and outright lies. He took it all very seriously, and he paid with his life.

Ask yourself, do you think this man was one of the 'people who matter' to his family? It sounds like some of them agree with, and listened to him and the fire hose.

This is a fucking tragedy. This man is a casualty of the fight for democracy, and it is a damn fight when people are getting shot for it. Not because he bought into some bullshit; but because he was fed a line of shit by people he trusted. His political party.

This has got to stop, and I think that it surely will.

Let's hope it doesn't have to be at the expense of another man's life.

Another husband, father, grandfather, uncle or brother. Or worse, whole families.

sparseMatrix @kbin.social 3y ago

@readbeanicecream

Great thread y'all ,TYSM.

sparseMatrix @kbin.social 3y ago

@gentleman

@blightbow

I too tried to flee reddit for lemmy.ml, over a year ago now - and found it to be a far worse clusterfucked shitstorm than reddit ever was, and I mean that ideologically, philosophically, politically, and morally.

I just didn't go back until the current exodus, mainly because I was trying to see if the account still worked, and it had been lost/purged/banned whatever

fuck those guys and the horse they rode in on, then far as I'm concerned, they can ride it back out of here wet.

Might as well federate with facebook.

sparseMatrix @kbin.social 3y ago

@Roundcat

Meta is facebook who engaged Cambridge Analytica to purchase our lives.

Not from us, but from them. Facebook literally sold out the world

Facebook nearly destroyed this country for a buck.

Fuck facebook. I don't want to avoid federating because I dont want them around; I want to avoid federating because anything I can do to starve them of every resource for growth that I possibly can is the best thing I can do about facebook.

sparseMatrix

Messages / Notifications are unreadable - accessing page gives 50X error.

Messages / Notifications are unreadable - accessing page gives 50X error.

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