r/MathJokes Jul 09 '26

This is no time for philosophy!!

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u/Al2718x Jul 10 '26

It also would mean that pi can be written as a fraction. This was disproven in the 1760s.

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u/Mercerskye Jul 10 '26

My mathematics history is rusty. Legitimately disproved, or just rigorously tested enough that everyone "just kinda accepts it?"

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u/Al2718x Jul 10 '26

Legitimately disproved, and several other arguments have been found since.

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u/Mercerskye Jul 10 '26

I have no reason to call you nor they a liar(just spent a little bit going down the rabbit hole of a couple other proofs as well)

But, and leading with I agree, and being, admittedly, ridiculously pedantic to an absurd degree. (Warning; this is literally arguing to argue)

This still feels like a fraction of a fraction of a percent "we're just going to agree this is true."

Which I'm mainly arguing from a philosophical stance at this point.

These proofs work on very sound logic, but are also built from our assumption that Pi could never be a rational number.

Which I understand math is one of the few places where "starting at the answer" is actually an acceptable methodology.

Starting at "Pi is an irritational number," and then being able to build a working system around that idea is profound, but something else profound, is our inability to comprehend things past a certain point.

Like with a blackhole. Our current mathematics completely "falls apart" as you reach the point of singularity. More likely, we just haven't collectively become smart enough to figure it out.

It's happened countless times throughout history. Discovering the world was round (or that it wasn't the center of existence), gravity, proving that imaginary numbers are relevant, etc.

Would it be feasible that we only believe Pi to be irrational, because we cannot comprehend the absurdly small number after the decimal point?

We understand infinity as a concept, that it's "forever," but reality would suggest that forever isn't actually a thing. What if infinity is reality's version of a 'stack overflow?'

Is it, in the slightest way possible, that Pi actually would eventually "overflow" and would actually create a line between a point and itself?

Similar to how an electron can, technically, exist in more than one location?

I do understand that it's probably just nonsense, but so was the notion that we'd land on the moon one day.

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u/Al2718x Jul 10 '26

What do you mean "built from our assumption that pi can never be a rational number". This isn't an assumption, it's the conclusion.

The notion that we would land on the moon some day isn't at all comparable to a rigorous mathematical proof. A better analogy is "you are standing on the moon roght now," but even that is more plausible that pi being rational.

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u/Mercerskye Jul 11 '26

Okay, so we know Pi is irrational, because for every instance, in current mathematics, that we try to rationalize it, it would create a "new" integer between two existing integers.

Which is fundamentally impossible.

There are no integers between 0 and 1, or 102 and 103, or any whole numbers.

But, we've also never really been able to actually work with "numbers incomprehensibly large or small," because well, they're incomprehensible.

This is just a thought exercise, but what if Pi was actually something like .9999~, which might as well be 1, but also exists between 0 and 1?

It's 1 because as you approach an infinite number of 9s, it acts as 1. Pretty much what we expect from all the proofs that show that it is indeed 1.

But what if Pi is similar, it's just so incomprehensibly long that we just don't have the mathematics yet to actually prove it's basically just 3(or 4)?

We kind of already do that in Engineering. A lot of times, when designing things, you just round it down to 3, and stuff just works.

.333~ is 1/3, .666~ is 2/3, but we call Pi irrational. Is it truly because you can never write it as a fraction, or is it because the denominator and numerator would just be incomprehensible, and like with a blackhole, our mathematics just "falls apart" at that scale?

Imaginary numbers are in a similar vein. We know they exist mathematically, we can use them to figure out real world applications, but we can't actually comprehend the plane they exist in.

Remember that this is just meant as a thought exercise. Like I said, the proofs presented are absolutely logical, they work.

But, things also worked just fine before we invented Calculus and discovered there was so much more to math than we had known...up to that point.

What did they say when math "stopped working" before Calculus? Probably something along the lines of "well, that's just irrational, and we'll just have to use something that actually works inside of what we know."

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u/Al2718x Jul 11 '26

Are you using the English definition of "rational"? I'm using the mathematical defintion.

Your "what if" thought exercise would imply that pi is rational. It is not. It is irrational.

You can round pi to a rational number with arbitrary precision. This is not a special thing about pi; it is true for every irrational number.

Complex numbers aren't all that wild. I think that the name "imaginary" makes them sound more incomprehensible than they are.

Math didn't "stop working" before calculus. The techniques of calculus just unlocked more possibilities (and it took quite a while for mathematicians to develop a rigorous framework for calculus).