Where is i? Is it safe? Is it alright?
this post was submitted on 11 Dec 2023
923 points (97.8% liked)
Science Memes
11243 readers
2873 users here now
Welcome to c/science_memes @ Mander.xyz!
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.
Rules
- Don't throw mud. Behave like an intellectual and remember the human.
- Keep it rooted (on topic).
- No spam.
- Infographics welcome, get schooled.
This is a science community. We use the Dawkins definition of meme.
Research Committee
Other Mander Communities
Science and Research
Biology and Life Sciences
- !abiogenesis@mander.xyz
- !animal-behavior@mander.xyz
- !anthropology@mander.xyz
- !arachnology@mander.xyz
- !balconygardening@slrpnk.net
- !biodiversity@mander.xyz
- !biology@mander.xyz
- !biophysics@mander.xyz
- !botany@mander.xyz
- !ecology@mander.xyz
- !entomology@mander.xyz
- !fermentation@mander.xyz
- !herpetology@mander.xyz
- !houseplants@mander.xyz
- !medicine@mander.xyz
- !microscopy@mander.xyz
- !mycology@mander.xyz
- !nudibranchs@mander.xyz
- !nutrition@mander.xyz
- !palaeoecology@mander.xyz
- !palaeontology@mander.xyz
- !photosynthesis@mander.xyz
- !plantid@mander.xyz
- !plants@mander.xyz
- !reptiles and amphibians@mander.xyz
Physical Sciences
- !astronomy@mander.xyz
- !chemistry@mander.xyz
- !earthscience@mander.xyz
- !geography@mander.xyz
- !geospatial@mander.xyz
- !nuclear@mander.xyz
- !physics@mander.xyz
- !quantum-computing@mander.xyz
- !spectroscopy@mander.xyz
Humanities and Social Sciences
Practical and Applied Sciences
- !exercise-and sports-science@mander.xyz
- !gardening@mander.xyz
- !self sufficiency@mander.xyz
- !soilscience@slrpnk.net
- !terrariums@mander.xyz
- !timelapse@mander.xyz
Memes
Miscellaneous
founded 2 years ago
MODERATORS
Please stop talking about your imaginary girlfriend, it's embarrassing honestly.
load more comments
(2 replies)
Nope, you fell for the classic sibling blunder:
What about INFINITY PLUS ONE!?
It's Infinity! Infinity -1? also infinity! Well what about infinity times infinity? Believe it or not, infinity! ♾️
What about infinity times zero?
For that one we're going to call my good friend L'Hôpital. That guy rules!
load more comments
(1 replies)
load more comments
(2 replies)
Last time I saw this kind of challenge it was on reddit and I just replied with ℝ, but people brought up that this leaves out complex numbers. I'll now contend, however, that any number not included in that isn't real.
You could use ℂ
Quaternions hello?
What about quaternions and octonions and ...
{x | x is a number}
load more comments
(2 replies)
Just like birds, complex numbers aren't real!
Screw you sqrt(-1), you aren't even a real number, you poser!
load more comments
(2 replies)
Aren't there numbers past (plus/minus) infinity? Last I hear there's some omega stuff (for denoting numbers "past infinity") and it's not even the usual alpha-beta-omega flavour.
Come to think of it, is there even a notation for "the last possible number" in math? aka something that you just can't tack "+1" at the end of to make a new number?
What you're probably thinking of is Ordinal numbers.
As for your second question, I don't think any "last number" could exist unless we explicitly declared one. And even then... I'm not sure what utility there would be in declaring a "last number".
load more comments
(1 replies)
Which of the infinities? There are many, many :D
The smallest infinity is the size of the natural numbers. That infinty, Aleph zero, is smaller than the infinity of the real numbers, Aleph one. "etc."
Which of the infinities? There are many, many :D
Oh no! Please don't tell me there are infinity infinities!
Unfortunately yes there are and it's a very big infinity of infinties....
load more comments
(1 replies)
Wait, they ran out of greek letters and started using Hebrew ones now? When did that happen?
load more comments
(1 replies)
load more comments
(2 replies)
There is nothing "past" infinity, infinity is more a concept than a number, there are however many different kinds of infinity. And for the record, infinity + 1 = infinity, those are completely equal. Infinity + infinity = infinity x 2 = still the same kind of infinity. Infinity times infinity is debatably a different kind of infinity but there are fairly simple ways of showing it can be counted the same.
Essentially the number of numbers between 1 and 2 is the same as the number of numbers between 0 and infinity. They are still infinite.
Hi, I'm a mathematician. My specialty is Algebra, and my research includes work with transfinites. While it's commonly said that infinity "isn't a number" I tend to disagree with this, since it often limits how people think about it. Furthermore, I always find it odd when people offer up alternatives to what infinity is; are numbers never concepts?
Regardless, here's the thing you're actually concretely wrong about: there are provably things bigger than infinity, and they are all bigger infinities. Furthermore, there are multiple kinds of transfinite algebra. Cardinal algebra behaves mostly like how you described, except every transfinite cardinal has a successor (e.g. There are countably many natural numbers and uncountably many complex numbers). Ordinal algebra, on the other hand, works very differently: if ω is the ordinal that corresponds to countable infinity, then ω+1>ω.
load more comments
(2 replies)
IIRC Depends if you talk about cardinal or ordinal numbers. What I remember: In cardinal numbers (the normal numbers we think of, which denote quantity, etc.) have their maximum in infinity. But in ordinal numbers (which denote order - first, second, etc.) Can go past infinity - the first after infinity is omega. Then omega +1. And then some bigger stuff, which I don't remember much, like aleph 0 and more.
load more comments
(3 replies)
load more comments
(3 replies)
Doesn't include "i"
i isn't a real number, you imagined it
From gatekeeping to gaslighting in 2 comments. Not bad!
What a girlboss
not a real number
Oh you like math? Name all the sets of sets that don’t include themselves.
load more comments
(3 replies)
0,1,2,3,4,5,6,7,8,9
[0-9]*\.?[0-9]*
edit: ok no empty strings [0-9]+\.?[0-9]*
That regex implies “” is a number
If I had a nickel for every time that happened I'd have "" nickels.
I didn't realize '.' is a number.
\([0-9]+\.[0-9]\)?[0-9]* is more accurate I think.
load more comments
(4 replies)
load more comments
(4 replies)
load more comments
(1 replies)
You also have to remember to put the +C at the end
Pi
*
Fred.
(∀x:Number(x)=T)(Name(x)="Fred")
I name every number Fred.
view more: next ›