this post was submitted on 04 Oct 2023
1608 points (99.0% liked)

News

23266 readers
3718 users here now

Welcome to the News community!

Rules:

1. Be civil


Attack the argument, not the person. No racism/sexism/bigotry. Good faith argumentation only. This includes accusing another user of being a bot or paid actor. Trolling is uncivil and is grounds for removal and/or a community ban. Do not respond to rule-breaking content; report it and move on.


2. All posts should contain a source (url) that is as reliable and unbiased as possible and must only contain one link.


Obvious right or left wing sources will be removed at the mods discretion. We have an actively updated blocklist, which you can see here: https://lemmy.world/post/2246130 if you feel like any website is missing, contact the mods. Supporting links can be added in comments or posted seperately but not to the post body.


3. No bots, spam or self-promotion.


Only approved bots, which follow the guidelines for bots set by the instance, are allowed.


4. Post titles should be the same as the article used as source.


Posts which titles don’t match the source won’t be removed, but the autoMod will notify you, and if your title misrepresents the original article, the post will be deleted. If the site changed their headline, the bot might still contact you, just ignore it, we won’t delete your post.


5. Only recent news is allowed.


Posts must be news from the most recent 30 days.


6. All posts must be news articles.


No opinion pieces, Listicles, editorials or celebrity gossip is allowed. All posts will be judged on a case-by-case basis.


7. No duplicate posts.


If a source you used was already posted by someone else, the autoMod will leave a message. Please remove your post if the autoMod is correct. If the post that matches your post is very old, we refer you to rule 5.


8. Misinformation is prohibited.


Misinformation / propaganda is strictly prohibited. Any comment or post containing or linking to misinformation will be removed. If you feel that your post has been removed in error, credible sources must be provided.


9. No link shorteners.


The auto mod will contact you if a link shortener is detected, please delete your post if they are right.


10. Don't copy entire article in your post body


For copyright reasons, you are not allowed to copy an entire article into your post body. This is an instance wide rule, that is strictly enforced in this community.

founded 1 year ago
MODERATORS
 

Study math for long enough and you will likely have cursed Pythagoras's name, or said "praise be to Pythagoras" if you're a bit of a fan of triangles.

But while Pythagoras was an important historical figure in the development of mathematics, he did not figure out the equation most associated with him (a2 + b2 = c2). In fact, there is an ancient Babylonian tablet (by the catchy name of IM 67118) which uses the Pythagorean theorem to solve the length of a diagonal inside a rectangle. The tablet, likely used for teaching, dates from 1770 BCE – centuries before Pythagoras was born in around 570 BCE.

you are viewing a single comment's thread
view the rest of the comments
[–] bobby_hill@lemmy.world 97 points 1 year ago (5 children)

I thought it was well established that Pythagoras didn't actually derive his namesake theorem?

[–] peopleproblems@lemmy.world 94 points 1 year ago (2 children)

It is. There's evidence of its use in the Old Babylonian period, evidence in 1800 B.C.E Egypt, India in 700-500 BCE, China during the Han Dynesty at least.

It's very simple to prove, and anywhere you find squares or triangles in architecture, it was used.

[–] someguy3@lemmy.ca 48 points 1 year ago (1 children)

I'm assuming it was discovered multiple times independently. Pythagorean is just the one that wasn't forgotten.

[–] RichardB@lemmy.world 25 points 1 year ago (3 children)

The Romans built off of Greek culture, Europe built off of Roman culture, the US built off of European culture. US math is very much based on Greek math (and US education in general). You may remember doing Greek proofs in school. Greek math was by no means superior to any other culture's, it just so happens that US culture descends from Greek culture.

[–] someguy3@lemmy.ca 24 points 1 year ago (1 children)

But thank the gods we adopted Hindu-arabic numerals.

[–] raspberriesareyummy@lemmy.world 3 points 1 year ago* (last edited 1 year ago) (1 children)

But thank the gods we adopted Hindu-arabic numerals.

ssshh don't tell the republican bigots they are using terrorist numerals ;) /s

[–] DragonTypeWyvern@literature.cafe 1 points 1 year ago (1 children)

We do, then we film the results and laugh.

Then wonder why the r u r a l s don't like city folk.

[–] raspberriesareyummy@lemmy.world 2 points 1 year ago (1 children)

to be fair, being "city folk" vs. being "rural" doesn't really qualify as an excuse for different levels of education. if it is the case anywhere (and admittedly it seems to be) that's a testament to the need for improvement of the education system.

[–] kent_eh@lemmy.ca 1 points 1 year ago (1 children)

being "city folk" vs. being "rural" doesn't really qualify as an excuse for different levels of education

Availability of schools and ability (or willingness) to pay for good teachers very much does correlate to levels of education available in different places.

You're not wrong. Nasty negative feedback loop :(

[–] postmateDumbass@lemmy.world 14 points 1 year ago

Pretty sure the Summarians were doing astronomy, they probably had all sorts of geometry figured out.

[–] jasory@programming.dev 3 points 1 year ago

At some points it was "superior". Elements was used as a textbook throughout Europe and the Arab world, because it was one of the first and few books with rigorous proofs. If course it was probably compromised of previous works, but there was really nothing else like it.

[–] KevonLooney@lemm.ee 10 points 1 year ago (1 children)

The Han Dynasty started in 202 BC. That's after Pythagoras died. Not the same thing.

[–] peopleproblems@lemmy.world 4 points 1 year ago

My point was they likely used it independently.

[–] PugJesus@kbin.social 29 points 1 year ago* (last edited 1 year ago)

It's a matter of debate whether he discovered it independently or not, though we've known he wasn't the first for a while.

[–] jarfil@lemmy.world 26 points 1 year ago

People can re-invent and re-discover things. It still happens all the time in this day and age of worldwide massive communications. I'd be surprised if the right angle theorem didn't get discovered thousands of times throughout history.

[–] Salamendacious@lemmy.world 25 points 1 year ago (1 children)

Everyone learns something new everyday. How often have you seen a TIL and thought, "doesn't everyone know that"

[–] Stingray@reddthat.com 17 points 1 year ago (2 children)
[–] swope@kbin.social 8 points 1 year ago

Someone here is seeing this xkcd for the first time just now...

[–] SnipingNinja@slrpnk.net 4 points 1 year ago* (last edited 1 year ago)

This is my favourite xkcd

Edit: I gotta say it should be 380000 though, because it should be applied to the world instead of being US centric

[–] Spzi@lemm.ee 5 points 1 year ago

Browsing the wikis, I got the impression research is unconclusive. We don't know if he had a role regarding the theorem, and what it was.

There is debate whether the Pythagorean theorem was discovered once, or many times in many places, and the date of first discovery is uncertain, as is the date of the first proof. Historians of Mesopotamian mathematics have concluded that the Pythagorean rule was in widespread use during the Old Babylonian period (20th to 16th centuries BC), over a thousand years before Pythagoras was born.[68][69][70][71]

The German version also talks about the various roles Pythagoras might have had or not had regarding the theorem, and how research is unconclusive. One such possibility is that this older Clay Tablet applied the theorem without being able to prove it, and Pythagoras or one of his students could have found a proof.

Also:

The history of the theorem can be divided into four parts: knowledge of Pythagorean triples, knowledge of the relationship among the sides of a right triangle, knowledge of the relationships among adjacent angles, and proofs of the theorem within some deductive system.

So there were lots of meaningful steps one could achieve without actually deriving the theorem. Maybe people were happy to just use math because it works, and a thousand years later someone bothered to prove why.