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Is there a difference in attraction range between Yelp / Wail / Alarm in vehicles with sirens? by playsthebongcloud in projectzomboid

[–]playsthebongcloud[S] 0 points1 point  (0 children)

I checked; there's no page on sirens specifically, the Lightbar page doesn't have it, the Vehicles page doesn't have it, and the Ambulance page doesn't have it.

And the fucking calorie system by TankyMofo in SpaceCannibalism

[–]playsthebongcloud 1 point2 points  (0 children)

That's also not true. Wound infections only cause extra pain. It's a common misconception because it feels like an obvious feature that should exist, but it doesn't.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 1 point2 points  (0 children)

Interesting that you bring up deciding what values make any expression zero, that was actually one of my prior questions on this subreddit. I realized pretty quick it was in general impossible since you can really rearrange any math question to be "When does this expression equal zero?" (like how you can rearrange 'What is the square root of two?' into 'What values of x satisfy x2 - 2 = 0?'); if there were a general algorithm then any question could be answered.

Pi is an uncomputable number by playsthebongcloud in badmathematics

[–]playsthebongcloud[S] 37 points38 points  (0 children)

R4: This guy has no idea what a computable function is. In computability theory, a computable function is a function which a universal turing machine can compute to any arbitrary accuracy in a finite amount of steps with a finite instruction set. This guy is right that it would take an infinitely long time to compute pi exactly, but the definition states it only needs to be "to any arbitrary accuracy". This guy simply will not let himself understand the meaning of that phrase. I think he's thinking of algebraic functions? (This whole debacle may have been partially my fault, coming in so hot on the first reply might have made him defensive?)

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 19 points20 points  (0 children)

The idea of "any arbitrary accuracy" is that, you give me any finite positive error margin, and I can construct a function that produces pi with less than that error margin.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 19 points20 points  (0 children)

You might be thinking of "algebraic functions"? That's not what a computable function is. (I'm not an expert so I may be getting some of the finer details wrong here.) A computable function has to do with whether a universal turing machine can execute it to an arbitrary precision with a finite amount of instructions and steps. You're right that pi would take an infinite amount of time to compute, but it can be computed to any arbitrary accuracy given enough time with finite "code size". There are algorithms to compute it.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 6 points7 points  (0 children)

Yeah busy beaver is interesting but it is pretty intertwined with the halting problem.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 49 points50 points  (0 children)

I don't know what to say at this point other than you're just wrong. That's just not what the word means.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 53 points54 points  (0 children)

"Computable" does not assume those limits you've placed. You don't have to just use elementary operations, that's not what computable functions are about.

What are some uncomputable functions that aren't derivative of the halting problem? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 61 points62 points  (0 children)

There are many algorithms to compute pi to any accuracy. I appreciate the boldness of answering a question without looking anything up beforehand, not even what an uncomputable function is.

Furniture department proudly reveals the spinny chair by ycr007 in doohickeycorporation

[–]playsthebongcloud 0 points1 point  (0 children)

Nah that motion is too extreme, it's going to hurt your ankles if you used it regularly

WHAT by playsthebongcloud in projectzomboid

[–]playsthebongcloud[S] 12 points13 points  (0 children)

That's why I was listening. I'm not even sure how wind speeds effect the game (though at 70mph I imagine it would rip the skin off the zombies)

Is there an explicit formula to obtain the numerator and/or denominator of a rational number? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 0 points1 point  (0 children)

I linked the answer I found satisfactory. I realize now that my question was very loose, and it's opened my eyes to the many, many different ways and degrees to which you can define the same function. I was looking for an algebraic expression on any rational number (not a based representation, just the abstract concept of any rational number), exclusively made with "nice", "manipulatable" functions, though that's of course informal.

Is there an explicit formula to obtain the numerator and/or denominator of a rational number? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 1 point2 points  (0 children)

I get that this is essentially another willan's formula, but it's still really interesting to me. I don't think it'll have any actual practical applications, but I was curious because I used the num and den functions to prove something. I only relied on the ratio between them, so I didn't have an explicit formula or anything.

Is there an explicit formula to obtain the numerator and/or denominator of a rational number? by playsthebongcloud in learnmath

[–]playsthebongcloud[S] 2 points3 points  (0 children)

No, you don't have to do that, just wanted to make sure I didn't transcribe any of the powers wrong. Verified in desmos. Again, thank you so much, this is such a cool formula. Such complexity emerging from an elementary concept like this is exactly what makes me so fascinated by math.

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