Search found 5554 matches

by Xanthir
Wed Sep 19, 2018 1:45 am UTC
Forum: Mathematics
Topic: slightly better symbols for numbers
Replies: 6
Views: 793

Re: slightly better symbols for numbers

Oof, yeah, those are terrible, sorry. Humans can't count-on-sight piles greater than 5 or 6, in general. This means the digits for 7-9 are very difficult to tell apart from each other. This is why roman numerals have a special form for 5/50/500, rather than just using IIIIIII (which I'm certain you ...
by Xanthir
Sun Sep 16, 2018 10:05 pm UTC
Forum: Mathematics
Topic: a simple disproof of the abc conjecture
Replies: 10
Views: 682

Re: a simple disproof of the abc conjecture

Ah, ninja'd.

Yeah, looking at a few values does not disprove anything. What you have so far is not remotely a disproof, it's an observation that this particular pattern generates "big Cs" more often than other patterns of similar complexity.
by Xanthir
Sun Sep 16, 2018 10:04 pm UTC
Forum: Mathematics
Topic: a simple disproof of the abc conjecture
Replies: 10
Views: 682

Re: a simple disproof of the abc conjecture

however with 1 +(9^n-1) = 9^n, 9^n-1 is divisible by 8, and 9^n is just 3, which means for any integer value of n 1 or more will result in 9^n /rad(2*3*(9^n-1)/8) which means the power can be as high as 1.026 approximately before it's larger. You need to go into this more. What precisely do you thi...
by Xanthir
Sun Sep 16, 2018 9:30 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9870
Views: 1778975

Re: Coding: Fleeting Thoughts

↶ Using do notation should just be the obvious "three lines, each pulling the value out of a deeper monad" thing: That's what you'd think at first, yes. But GHC will immediately complain that it can't match [] with IO . And then you realize (>>=) (and related combinators) work with m a ->...
by Xanthir
Sun Sep 16, 2018 8:15 pm UTC
Forum: Mathematics
Topic: a simple disproof of the abc conjecture
Replies: 10
Views: 682

Re: a simple disproof of the abc conjecture

Please state this in a way that's actually comprehensible.
by Xanthir
Sun Sep 16, 2018 5:38 pm UTC
Forum: Coding
Topic: SVG definition over-riding
Replies: 5
Views: 484

Re: SVG definition over-riding

Yo, it goes great for me, and I don't rely on the board to tell me anything, I just check the ~10 boards I actually read roughly daily. ^_^
by Xanthir
Fri Sep 14, 2018 5:26 pm UTC
Forum: Gaming
Topic: FTL - ohcrapshieldsaredown!
Replies: 361
Views: 76727

Re: FTL - ohcrapshieldsaredown!

That's what fire is for.

(I've never even reached the flagship on hard, let alone beat it.)
by Xanthir
Thu Sep 13, 2018 3:06 pm UTC
Forum: Coding
Topic: SVG definition over-riding
Replies: 5
Views: 484

Re: SVG definition over-riding

Can't be done without CSS. Can be done quite easily with, and you can just write it inline: <!DOCTYPE html> <svg> <defs><rect id=foo width=100 height=100 fill="var(--color, red)" /></defs> <use href="#foo" style="--color: green"/> </svg>
by Xanthir
Wed Sep 12, 2018 4:16 pm UTC
Forum: Computer Science
Topic: a neat picture based on recursive number
Replies: 10
Views: 1607

Re: a neat picture based on recursive number

Ah, indeed! I hadn't quite fully gathered the recursive nature there. So you're expressing a number solely by using the nth-prime() function, multiplication, and the number 1. For compactness, nth-prime(arg) is instead written as <arg>, multiplication is implicit from concatenation, and 1 can be omi...
by Xanthir
Wed Sep 12, 2018 4:02 pm UTC
Forum: Fictional Science
Topic: A dragon confronts the Terasem movement
Replies: 50
Views: 3297

Re: A dragon confronts the Terasem movement

THREAD HIJACK ↶ Which, to be fair, is because the transporters never made sense with the rest of the technology anyway and were shoved in for filming convenience in the original series with the explanation following. They and the replicators are both limited to doing the one job they're assigned, de...
by Xanthir
Wed Sep 12, 2018 3:47 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9870
Views: 1778975

Re: Coding: Fleeting Thoughts

Using do notation should just be the obvious "three lines, each pulling the value out of a deeper monad" thing: do files <- listDirectory dir file <- files contents <- readFile file doStuffWithContents contents And yeah, to tell IO to close the file you force strictness. Pulling some examp...
by Xanthir
Fri Sep 07, 2018 4:06 am UTC
Forum: Fictional Science
Topic: A dragon confronts the Terasem movement
Replies: 50
Views: 3297

Re: A dragon confronts the Terasem movement

↶ If you can decompress/unpause the thing back into a person with full value, why would it have any less value as a person when paused? There is an argument to be made that only the *last* remaining copy has value; up to that point, undo operations are possible... after that point it is a murder. Y...
by Xanthir
Wed Sep 05, 2018 4:36 pm UTC
Forum: Fictional Science
Topic: A dragon confronts the Terasem movement
Replies: 50
Views: 3297

Re: A dragon confronts the Terasem movement

Yeah, ultimately, posts that are just links to something else, with no commentary or discussion, are more or less verboten here. At minimum, they're considered quite rude. Like, thanks for letting us know, cool, but this board isn't an RSS reader; if we care about updates to your blog we'll follow i...
by Xanthir
Wed Sep 05, 2018 3:33 pm UTC
Forum: Fictional Science
Topic: A dragon confronts the Terasem movement
Replies: 50
Views: 3297

Re: A dragon confronts the Terasem movement

ahahahaha
by Xanthir
Wed Sep 05, 2018 5:55 am UTC
Forum: Computer Science
Topic: a neat picture based on recursive number
Replies: 10
Views: 1607

Re: a neat picture based on recursive number

First, neat picture! It's always cool to see the kind of emergent patterns that come out of simple rules like this. Second, the few numbers you provided give *no* clue as to the pattern you're following. I had to puzzle thru your Python to figure it out instead. From what I can tell, the pattern is:...
by Xanthir
Wed Sep 05, 2018 4:16 am UTC
Forum: Fictional Science
Topic: A dragon confronts the Terasem movement
Replies: 50
Views: 3297

Re: A dragon confronts the Terasem movement

Nah, a good part of this is definitely arguments from incredulity. You don't believe that consciousness can be embodied in "unlikely" mediums (repeatedly calling the idea "patently absurd"), like a Turing machine. Several of your later "refutations" hinge on this basic ...
by Xanthir
Fri Aug 31, 2018 6:06 pm UTC
Forum: Science
Topic: Word Based Consciousness
Replies: 11
Views: 855

Re: Word Based Consciousness

Dont' worry, you've just plumbing a deep well of philosophers thinking "well, my brain works like this, so clearly everyone else's does too, so here are some Deep Truths".
by Xanthir
Wed Aug 29, 2018 7:51 pm UTC
Forum: Gaming
Topic: Cyber Tank - please help !!!!
Replies: 20
Views: 968

Re: Cyber Tank - please help !!!!

Okay, so I got to stage 23... and I'm also stumped. I can get the upper two cubes into the water to form bridges, and I can get all the lower cubes up to it, and I can't figure out what's up from there.
by Xanthir
Wed Aug 29, 2018 4:18 pm UTC
Forum: Mathematics
Topic: "Generalized" polygons?
Replies: 10
Views: 669

Re: "Generalized" polygons?

Yup, that's all this is - a generalization of the polygonal number sequences to allow for 0 and negative sides.
by Xanthir
Sun Aug 19, 2018 12:35 pm UTC
Forum: Mathematics
Topic: Reuse of common variables (A B C X Y α ß µ σ)
Replies: 13
Views: 1300

Re: Reuse of common variables (A B C X Y α ß µ σ)

I mean, ultimately the problem is that mathematicians are allergic to good variable naming. Using single-letter variable names for anything other than a transient temporary variable used in a rote, expected position (loop iteration, or the sole argument to a small lambda) is considered extremely bad...
by Xanthir
Fri Aug 10, 2018 10:19 pm UTC
Forum: Science
Topic: What sort of orbit changes (and other things) would it take for "daylight shifting"?
Replies: 2
Views: 750

Re: What sort of orbit changes (and other things) would it take for "daylight shifting"?

There's no way to do it by just having a planet in orbit. Assuming noon = solar noon, sunrise and sunset are approximately equal distance from noon, by definition. The only way to get them different is to shift the legal definition of "noon" to be not solar noon. You could fiddle with it *...
by Xanthir
Tue Aug 07, 2018 6:29 pm UTC
Forum: Mathematics
Topic: A biology-related statistic math problem
Replies: 7
Views: 881

Re: A biology-related statistic math problem

Ah, you didn't list "can't degrade" in your first setup of the problem, so when you mentioned it later I thought you were just inaccurately glossing your previous constraints. So yeah, we're in intensely magical territory here, with a hyper-intelligence watching every mutation and modeling...
by Xanthir
Tue Aug 07, 2018 6:23 pm UTC
Forum: Science
Topic: Formal definition of genetic fitness
Replies: 8
Views: 816

Re: Formal definition of genetic fitness

Any tracking over multiple generations has to take into account the changing environment the genes find themselves in, which greatly complicates the idea of a stable "fitness" score you can assign cross-generationally. So it's not unreasonable to take the simple route and classify it in a ...
by Xanthir
Tue Aug 07, 2018 6:17 pm UTC
Forum: Mathematics
Topic: A biology-related statistic math problem
Replies: 7
Views: 881

Re: A biology-related statistic math problem

"Can't die" and "can't become cancer" do not combine into "all mutations are positive". Most mutations are negative, and even if they're somehow magically prevented from killing the cell, they can still disable it or otherwise make it work badly in various ways. So you'...
by Xanthir
Sun Aug 05, 2018 6:38 pm UTC
Forum: Fictional Science
Topic: Trying to construct an ideal future virtual society of dragons
Replies: 18
Views: 1525

Re: Trying to construct an ideal future virtual society of dragons

The concept of a "far-future dragon society" apparently being a *thing* that a lot of people make variants of is clearly some norm from a community I've never touched on, so I'll leave that weirdness at arms-length. ^_^ Just some random bits, which are mostly me disagreeing with your moral...
by Xanthir
Wed Aug 01, 2018 5:56 pm UTC
Forum: Science
Topic: Miscellaneous Science Questions
Replies: 2870
Views: 643435

Re: Miscellaneous Science Questions

But a football cannon *could* launch it that far in a vacuum, theoretically. (Well, assuming that the football can stand up to the acceleration of the cannon. But imagine an arbitrarily-long football-railgun that can bring it to the desired velocity at an appropriately low acceleration.) But when yo...
by Xanthir
Tue Jul 31, 2018 4:30 pm UTC
Forum: Coding
Topic: Coding: Fleeting Thoughts
Replies: 9870
Views: 1778975

Re: Coding: Fleeting Thoughts

Note that you *can* retrieve all the Symbols attached to an object ; they're not "hidden" in any way whatsoever, they're just guaranteed to never collide with anything else unless you specifically use the same Symbol object. So if you really do have some private data to associate, you can'...
by Xanthir
Fri Jul 20, 2018 5:49 pm UTC
Forum: Coding
Topic: Empty lines inside long code blocks
Replies: 2
Views: 627

Re: Empty lines inside long code blocks

Agreed, blank lines separating out sections is great.

Alternately and often better: separate into pieces, then factor those pieces out into separate functions.
by Xanthir
Mon Jul 09, 2018 3:33 am UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 2362

Re: Cooling gas by expansion

Heimhenge wrote:
It would be cool (no pun intended) if that temperature came out to 2.6 kelvin.

There's nothing special about the CMBR temperature; it's just how cool the CMBR happens to be at our current time. It was hotter in the past, it'll be cooler in the future.
by Xanthir
Sun Jul 08, 2018 3:47 am UTC
Forum: Gaming
Topic: Pokemon Go
Replies: 123
Views: 24623

Re: Pokemon Go

Oh, good point! In that case, 3119 1908 3927, with my stops generally being from California.
by Xanthir
Tue May 15, 2018 8:44 pm UTC
Forum: Gaming
Topic: Gaming fleeting thoughts
Replies: 675
Views: 108953

Re: Gaming fleeting thoughts

First, I respect your opinion, because we all experience games differently and have different opinions about them, and that's all valid.

Second, I'LL FITE U
by Xanthir
Wed May 09, 2018 6:20 pm UTC
Forum: Computer Science
Topic: Formally, What is P and NP?
Replies: 19
Views: 5172

Re: Formally, What is P and NP?

You can discuss whatever you want, man. Nobody's stopping you.
by Xanthir
Fri May 04, 2018 7:25 pm UTC
Forum: Computer Science
Topic: Formally, What is P and NP?
Replies: 19
Views: 5172

Re: Formally, What is P and NP?

Yes, if you can establish that the "P" set is definitely a proper subset of the "NP" set (or, conversely, that they're the same set), then you've solved the problem.
by Xanthir
Wed May 02, 2018 4:33 pm UTC
Forum: Computer Science
Topic: Formally, What is P and NP?
Replies: 19
Views: 5172

Re: Formally, What is P and NP?

What "really long statement"?
by Xanthir
Wed May 02, 2018 4:02 am UTC
Forum: Computer Science
Topic: Formally, What is P and NP?
Replies: 19
Views: 5172

Re: Formally, What is P and NP?

Yes, P by definition is a subset of NP; everything in NP is definitely in P. It's just that "subset" might mean "same set".
by Xanthir
Sun Apr 29, 2018 7:46 pm UTC
Forum: Computer Science
Topic: Formally, What is P and NP?
Replies: 19
Views: 5172

Re: Formally, What is P and NP?

Nah, your second definition is fine afaict. Only correction: For this discussion, "too much" means that if the original TM always runs in polytime, then the resulting TM will always run in polytime as well. This definition doesn't require the original TM to run in polytime, just that when ...
by Xanthir
Sun Apr 29, 2018 7:42 pm UTC
Forum: The Help Desk
Topic: Compressing video and photo or I lose my job
Replies: 7
Views: 1760

Re: Compressing video and photo or I lose my job

Or just move some of the videos to a temporary location on another computer, then requisition a larger hard drive (or a better archiving scheme that doesn't rely on a whole bunch of large files all living on a single computer). Problem solved, both in the moment and longer term.
by Xanthir
Sun Apr 29, 2018 7:39 pm UTC
Forum: Fictional Science
Topic: Self-Contained Pure Fiction about the Fine Structure Constant
Replies: 12
Views: 3103

Re: Self-Contained Pure Fiction about the Fine Structure Constant

Wow this OP started interesting and then went off the rails surprisingly fast. Everything from numerology to patriarchy to messages from aliens, wowsers. ↶ If you think I'm wrong, the universe is right there, mathematics is right there, prove it chumps. ↶ The experimentally determined value of the f...
by Xanthir
Wed Apr 25, 2018 2:44 am UTC
Forum: Computer Science
Topic: Desirable Coding Skills
Replies: 13
Views: 2163

Re: Desirable Coding Skills

You get its integral. ^_^ I can highly recommend 3Blue1Brown's Essence of Calculus series . Each video is short and approachable, and the whole series is only about 4 hours total. It'll give you a really nice intuitive appreciation of what calculus is, what it does, and how and why it's used. (Try t...
by Xanthir
Tue Apr 24, 2018 6:31 pm UTC
Forum: Computer Science
Topic: Analysis of the Java RNG
Replies: 4
Views: 1601

Re: Analysis of the Java RNG

Oh duh, yeah, sorry, was assuming that the output was the state. If the output is trimmed from the state, you can def have repeated outputs that still have unique state and thus different successors.

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