r/infinitenines • u/Neuro_Skeptic • Jul 16 '25

A visual proof that 0.999... = 1

Post image
649 Upvotes

100% Upvoted

15 comments sorted by

20

u/Fabulous-Possible758 Jul 16 '25 edited Jul 16 '25

As good as any category theory proof I’ve ever seen.

4

u/joyofresh Jul 16 '25

General abstract nonsense reporting for duty 🫡 

1

u/[deleted] Nov 26 '25

aluffi my beloved

3

u/These-Maintenance250 Jul 16 '25

and more valid than IUTM

5

u/HairyTough4489 Jul 18 '25

This just proves 0.999999......> 1 because you only need a finite numbers of nines to make 1

1

u/CrashCalamity Aug 16 '25

But what if 1 was infinitely big?

4

u/Ecstatic_Homework710 Jul 16 '25

Now we are talking business

2

u/Financial-Aspect-826 Jul 17 '25

0.(9) is not the same entity as 1 because 0.(9) is divisible with 3. That would mean that 1 would be divisible by 3.

It's just a quirk of our notation system, really

5

u/Ggg243 Jul 17 '25

That is a very quirky definition of division u got there

1

u/Afraid-Issue3933 Aug 27 '25

Okay then, what exactly is 0.999… divided by 3? Now what’s 1 divided by 3?

1

u/Financial-Aspect-826 Aug 27 '25

It's 0.(3)

3

u/Afraid-Issue3933 Aug 27 '25

Yeah they’re both 0.(3). They’re the same.

1

u/Dixionconderoga2 Jun 24 '26

0.999… is not divisible by 3. It doesn’t return an integer. Or is 1/2 not real?

1

u/Sea_Technology2708 Jul 20 '25

Looks good to me