Effortpost: Schanuel's Conjecture

tl;dr I wanted to try something different. This is an introduction to Schanuel's conjecture, explaining its significance and hinting at related topics. There are some exercises, and theorems are stated, but not proved. Prerequisites: first-year university math, linear algebra, and preferably introductory abstract algebra. Those with Galois Theory under their belt should find everything simple and intuitive.

I. Transcendental Numbers

A complex number is called algebraic if it is the solution to some polynomial equation with rational coefficients. For example, √2 is an algebraic number, since it's a complex number and it solves the polynomial equation x^2 - 2 = 0. The number 2Γ—3^(1/3) is also algebraic: it is a solution of the polynomial equation x^3 - 24 = 0.

> Exercise: Prove that every rational number is algebraic.

> Exercise: Explain why the golden ratio is algebraic.

At this point, you might wonder: are there any numbers that are not algebraic?! Euler wondered about the same thing in the 1700s. He called non-algebraic numbers transcendental, and suspected that e and Ο€ were both transcendental numbers. It was a good fifty years after Euler's death that Liouville managed to prove the existence of transcendental numbers for the first time. Liouville used a technique called Diophantine Approximation to prove that the number L=βˆ‘*kβˆˆβ„•* 10^(-k!) is, in a certain technical sense, easier to approximate using rationals than any irrational algebraic number, and so L cannot be algebraic.

Liouville's proof required a fairly deep understanding of diophantine approximation of algebraic numbers. These days, we have a much quicker way of constructing transcendental numbers, using Cantor's diagonal argument. Since the algebraic numbers form a countable set, we can make a list of all the real algebraic numbers, and diagonalization will produce a real number absent from our list. That number cannot be algebraic, so it will have to be transcendental.

> Exercise: Prove that the real algebraic numbers are countable.

Thanks to Cantor, first year undergraduates can answer questions that baffled the great Euler! Thus advances mathematics.

However, it's very hard to prove the transcendence of numbers that were not specifically constructed for the purpose of proving them transcendental. Euler's suspicions about e and Ο€ being transcendental were confirmed only in the late 19th century. The transcendence of the following numbers is still unknown: Ο€+e, Ο€βˆ’e

... keep reading on reddit ➑

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πŸ‘€︎ u/TezlaKoil
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Proposed Proof of Schanuel's Conjecture on arxiv (implies pi+e, e^pi, etc is transcendental) arxiv.org/abs/1310.3777
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πŸ‘€︎ u/wgunther
πŸ“…︎ Oct 15 2013
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SERIOUS: This subreddit needs to understand what a "dad joke" really means.

I don't want to step on anybody's toes here, but the amount of non-dad jokes here in this subreddit really annoys me. First of all, dad jokes CAN be NSFW, it clearly says so in the sub rules. Secondly, it doesn't automatically make it a dad joke if it's from a conversation between you and your child. Most importantly, the jokes that your CHILDREN tell YOU are not dad jokes. The point of a dad joke is that it's so cheesy only a dad who's trying to be funny would make such a joke. That's it. They are stupid plays on words, lame puns and so on. There has to be a clever pun or wordplay for it to be considered a dad joke.

Again, to all the fellow dads, I apologise if I'm sounding too harsh. But I just needed to get it off my chest.

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πŸ‘€︎ u/anywhereiroa
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Blind Girl Here. Give Me Your Best Blind Jokes!

Do your worst!

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πŸ‘€︎ u/Leckzsluthor
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This subreddit is 10 years old now.

I'm surprised it hasn't decade.

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πŸ‘€︎ u/frexyincdude
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Dropped my best ever dad joke & no one was around to hear it

For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.

I said "hey look, an escaPEA"

No one near me but it didn't half make me laugh for a good hour or so!

Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies πŸ˜‚

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πŸ‘€︎ u/Vegetable-Acadia
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What starts with a W and ends with a T

It really does, I swear!

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πŸ‘€︎ u/PsychedeIic_Sheep
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What is a a bisexual person doing when they’re not dating anybody?

They’re on standbi

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πŸ‘€︎ u/Toby-the-Cactus
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What do you call quesadillas you eat in the morning?

Buenosdillas

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πŸ‘€︎ u/FarronKeepSucks
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Geddit? No? Only me?
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πŸ‘€︎ u/shampy311
πŸ“…︎ Dec 28 2021
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I wanna hear your best airplane puns.

Pilot on me!!

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πŸ‘€︎ u/Paulie_Felice
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E or ß?
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No spoilers
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Covid problems
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πŸ‘€︎ u/theincrediblebou
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Pun intended.
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πŸ‘€︎ u/Sharmaji1301
πŸ“…︎ Jan 15 2022
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These aren't dad jokes...

Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.

This sub is mostly just NSFW puns now.

If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.

Edit* I'm not replying any longer and turning off notifications but to all those that say "no one cares", there sure are a lot of you arguing about it. Maybe I'm wrong but you people don't need to be rude about it. If you really don't care, don't comment.

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πŸ‘€︎ u/Lance986
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I had a vasectomy because I didn’t want any kids.

When I got home, they were still there.

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πŸ‘€︎ u/demotrek
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What did 0 say to 8 ?

What did 0 say to 8 ?

" Nice Belt "

So What did 3 say to 8 ?

" Hey, you two stop making out "

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πŸ‘€︎ u/designjeevan
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Spi__
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What did Spartacus say when the lion ate his wife?

Nothing, he was gladiator.

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πŸ‘€︎ u/rj104
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I dislike karma whores who make posts that imply it's their cake day, simply for upvotes.

I won't be doing that today!

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The Ancient Romans II
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πŸ‘€︎ u/mordrathe
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I'd like to dedicate this joke to my wisdom teeth.

[Removed]

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πŸ‘€︎ u/ThoughtPumP
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How do you stop Canadian bacon from curling in your frying pan?

You take away their little brooms

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πŸ‘€︎ u/Majorpain2006
πŸ“…︎ Jan 09 2022
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I did it, I finally did it. After 4 years and 92 days I went from being a father, to a dad.

This morning, my 4 year old daughter.

Daughter: I'm hungry

Me: nerves building, smile widening

Me: Hi hungry, I'm dad.

She had no idea what was going on but I finally did it.

Thank you all for listening.

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πŸ‘€︎ u/Sk2ec
πŸ“…︎ Jan 01 2022
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It this sub dead?

There hasn't been a post all year!

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School Was Clothed
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πŸ‘€︎ u/Kennydoe
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Letting loose with these puns
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Couch potato
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Baka!
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All dad jokes are bad and here’s why

Why

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concrete πŸ—Ώ
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My name is ABCDEFGHIJKMNOPQRSTUVWXYZ

It’s pronounced β€œNoel.”

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Why are people so surprised and angry about Djokovic being an anti-vaxxer?

After all his first name is No-vac

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If Korean pop is shortened to Kpop and Korean Drama is Kdrama...

What, then, is Chinese rap?

Edit:

Notable mentions from the comments:

  • Spanish/Swedish/Swiss/Serbian hits

  • French/Finnish art

  • Country/Canadian rap

  • Chinese/Country/Canadian rock

  • Turkish/Tunisian/Taiwanese rap

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That’s Michelle
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πŸ‘€︎ u/FLEXSEALBREAKER
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Is this sub still active?

There hasn't been a single post this year!

(Happy 2022 from New Zealand)

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What did the ocean say to the beach?

Nothing, it just waved

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My 9 year old son just asked me to pretend I was a police officer arresting him for downloading the entire Wikipedia. Me: Young man, you're under arrest for downloading the entire Wikipedia!

Him: I can explain everything!

(It's his best joke yet I think)

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πŸ‘€︎ u/MrPJ2020
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is Isn't
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@u/mordrathe - remix
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What do you call a guy with no arms and no legs in a hot tub?

Bob

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πŸ‘€︎ u/4fuchssake
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I named my dog "5 miles."

So that I could frequently say, "I am going to walk 5 miles now."

Edit: My most popular post on Reddit! πŸ˜€ Thank you for the awards.

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My WIFI password is 2444666668888888

Just to clarify, 12345678

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πŸ‘€︎ u/az1m_
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Possibly the greatest Snap Reaction dad joke I've ever told (it even got me a POWERFUL groan and vehement FU from my wife)

Me grabbing a soda from my (what I thought was) half full 12pk...

Notices there's only 2;

Me: "Awe man... This is a damn bird box!" Her: "What the hell does that mean?!" Me: (Pulls both cans out & shows them to her) "It's only got Toucans."

I'm not ashamed to admit the look on her face was glorious.

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πŸ‘€︎ u/AKhakiNerfHerder
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I can't believe I was arrested for impersonating a politician...

I was just sitting there doing nothing.

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πŸ‘€︎ u/ENJOYblet
πŸ“…︎ Jan 05 2022
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The two genders
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Guns
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If β€œwomb” is pronounced β€œwoom” and β€œtomb” is pronounced β€œtoom” then shouldn’t β€œbomb” be pronounced…

β€œBOOM”?!

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