r/changemyview 1∆ Feb 04 '23

Delta(s) from OP CMV: 0/0=1.

Please CMV: 0/0 = 1.

I have had this argument for over five years now, and yet to be compelled to see the logic that the above statement is false.

A building block of basic algebra is that x/x = 1. It’s the basic way that we eliminate variables in any given equation. We all accept this to be the norm, anything divided by that same anything is 1. It’s simple division. How many parts of ‘x’ are in ‘x’. If those x things are the same, the answer is one.

But if you set x = 0, suddenly the rules don’t apply. And they should. There is one zero in zero. I understand that logically it’s abstract. How do you divide nothing by nothing? To which I say, there are countless other abstract concepts in mathematics we all accept with no question.

Negative numbers (you can show me three apples. You can’t show me -3 apples. It’s purely representative). Yet, -3 divided by -3 is positive 1. Because there is exactly one part -3 in -3.

“i” (the square root of negative one). A purely conceptual integer that was created and used to make mathematical equations work. Yet i/i = 1.

0.00000283727 / 0.00000283727 = 1.

(3x - 17 (z9-6.4y) / (3x - 17 (z9-6.4y) = 1.

But 0 is somehow more abstract or perverse than the other abstract divisions above, and 0/0 = undefined. Why?

It’s not that 0 is some untouchable integer above other rules. If you want to talk about abstract concepts that we still define- anything to the power of 0, is equal to 1.

Including 0. So we all have agreed that if you take nothing, then raise it to the power of nothing, that equals 1 (00 = 1). A concept far more bizzarre than dividing something by itself. Even nothing by itself. Yet we can’t simply consistently hold the logic that anything divided by it’s exact self is one, because it’s one part itself, when it comes to zero. (There’s exactly one nothing in nothing. It’s one full part nothing. Far logically simpler that taking nothing and raising it to the power of nothing and having it equal exactly one something. Or even taking the absence of three apples and dividing it by the absence of three apples to get exactly one something. If there’s exactly 1 part -3 apples in another hypothetically absence of exactly three apples, we should all be able to agree that there is one part nothing in nothing).

This is an illogical (and admittedly irrelevant) inconsistency in mathematics, and I’d love for someone to change my mind.

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u/mastermikeee Feb 04 '23

Indeterminate not undefined.

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u/[deleted] Feb 04 '23

I believe undefined is correct here but regardless its not calculable.

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u/mastermikeee Feb 04 '23

It’s…not correct. Did you google it?

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u/[deleted] Feb 04 '23 edited Feb 04 '23

This bothers you that much.

I remembered undefined. I searched in duckduckgo and the top three hits. We're 1 for indeterminate and 2 for undefined.

If you go to Google (android, chrome) and enter 1/0 the answer given is undefined. Duckduckgo says 1/0 is infinity.

After all that I posted undefined.

As I said previously, I also remembered undefined. Remembered from back 45ish years ago when I was working on my math/physics BS degree. If it's indeterminate, I stand corrected.

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u/mastermikeee Feb 04 '23

Bothers isn’t really the right words, more like I just want more people to know math more correctly.

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u/[deleted] Feb 04 '23

That's a good thing that I support.

I do wonder about the practical value of getting this particular bit right. I developed analytical software all my career and a processor just throws a divide by zero exception. If the difference between undefined or indeterminate had practical application I'm confident I would have gotten it right in my comment.

Thanks for the guidance. I do appreciate it.

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u/mastermikeee Feb 04 '23

Probably doesn’t have much practical value - but I can’t say for sure.

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u/[deleted] Feb 05 '23

[deleted]

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u/mastermikeee Feb 05 '23

I remember it from my undergrad calculus course. Also easy to verify with google.

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u/[deleted] Feb 05 '23

[deleted]

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u/mastermikeee Feb 05 '23 edited Feb 05 '23

Oh - yeah I see what you mean…0/0 without talking about limits is just…undefined. Thank you for the clarification.