Discover and read the best of Twitter Threads about #maths

Most recents (24)

Les #maths sont belles ! 2023 ed. spéciale polynôme
Pour cette série, les élèves de l'option mathématiques expertes devaient utiliser essentiellement les courbes représentatives de fonctions polynômes. 1/6
Les #maths sont belles ! 2023 ed. spéciale polynôme
Comment obtenir une courbe passant par 3 points ?
Comment ouvrir / fermer la parabole ?
Existe t'il plusieurs possibilités ?
🌋 ou 🌷 ? 2/6
Les #maths sont belles ! 2023 ed. spéciale polynôme
Dans le sud, on rêve de la mer toute l'année, et ça tombe bien elle est à moins d'une heure de notre lycée 😍 3/6
Read 7 tweets
Was treibt die Regierung an
biosafety grade 3
zoonotische Biohazards
zu verharmlosen & hoch präzise Präventiv-Tests zu verunglimpfen


kapiert niemand
den Zusammenhang #SARSCoV2 #monkeypox
mit PACS & MISC & LC
Wer hat was von diesem Irrsinn?!

Gerade eben 20.03.2023
Scheuch & aerzteblatt im Schwurbler Modus 🤬
Read 35 tweets
Next week we are getting the #Science on @camp_curiosity with a whole week of #outdoorscience for @ScienceWeekUK. On Monday we will be mashing together @WhiteRoseEd #maths & gross #science with a little help from @OperationOuch with Yr2/3 @DodlestonCofE . It’s compass #science
in the afternoon with Yr4/5 followed by some fire lighting #science & toasted marshmallows. Im keeping my 🤞🏼 for no rain Tuesday @KelsallSchool as we make some yummy edible #science with #EYFS before #exploding #science with after school club. Wednesday we will be exploring
#senses , creating life size bodies & making some 💩 with Yr1 @wolverhamhead. Thursday is a @camp_curiosity #popup @larkhillprimary with the whole school taking part in the #science of 🔥 to #igniteyourspark and to round off the week, Friday is a #science theme session
Read 4 tweets
Optimización con matrices: Ajuste por mínimos cuadrados.

Ha estado de moda la optimización con redes neuronales y eso, pero cuando se tienen pocos datos es más sencillo y entendible hacer un ajuste lineal de forma tradicional.
La mayoría de personas se remite a formulas poco entendibles de estadística, como:

Por si quieren ver el video (Ecuación de correlación lineal y coeficiente de correlación (Ejercicio 1)):
Existe una alternativa con algebra lineal, es usando mínimos cuadrados con matrices.

Todo lo que se tiene que hacer es:
Read 9 tweets
Fit a polynomial of degree D to N points by minimising the mean squared error. Now, start increasing D and look at the accuracy. The accuracy blows-up around D~N and starts improving *again* for D>>N 🙂

#doubleDescent #statistics #maths
"Learning to Generalize" by Manfred Opper… Image
Read 5 tweets
1/ Τα άλυτα προβλήματα της Αρχαιότητας (Μέρος Γ')

Έχουμε καθορίσει ως τώρα τι είναι, γενικά κι αόριστα, μία καμπύλη στο Καρτεσιανό Επίπεδο. Ωστόσο, εμάς δε μας νοιάζουν οι καμπύλες γενικά, αλλά πιο πεζά πράγματα όπως οι κύκλοι και τα τετράγωνα. Πώς, άραγε, περιγράφονται αυτά;
2/ Αφού μας απασχολεί ο τετραγωνισμός του κύκλου, ας ξεκινήσουμε με τους κύκλους στο Καρτεσιανό Επίπεδο. Όπως είπαμε, μία καμπύλη περιγράφεται ως ένα σύνολο σημείων της μορφής {(x,y): f(x,y)=0}. Ποια όμως είναι η κατάλληλη συνάρτηση f που μπορεί να περιγράψει έναν κύκλο;
3/ Ας σκεφτούμε λίγο ποια είναι η πλέον χαρακτηριστική ιδιότητα των σημείων ενός κύκλου: ισαπέχουν από το κέντρο του κύκλου. Πράγματι, αν γνωρίζουμε το κέντρο Κ(α,β) ενός κύκλου και την ακτίνα του (ρ), τότε μπορούμε να αποφανθούμε για κάθε σημείο Μ αν ανήκει ή όχι στον κύκλο.
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1/ Τα άλυτα προβλήματα της Αρχαιότητας (Μέρος Α').

Ο τετραγωνισμός του κύκλου (και ουχί η περικύκλωση του τετραγώνου), είναι ένα από τα κατεξοχήν προβλήματα που ζόρισαν αρκετά τους παλιότερους μαθηματικούς, μέχρι και αρκετά πρόσφατα. Αλλά... γιατί;
2/ Το πρόβλημα συνίσταται στο να πάρουμε έναν ωραίο κύκλο και να κατασκευάσουμε χρησιμοποιώντας κανόνα (μία ίσια βέργα, δηλαδή) και διαβήτη ένα τετράγωνο με εμβαδό όσο ακριβώς και ο κύκλος. Εύκολο, με μία πρώτη ανάγνωση, θα πει κανείς. Ωστόσο...
3/ ...αιώνες ενασχόλησης με τα μαθηματικά απέδειξαν ότι δεν είναι και τόσο εύκολο, τελικά. Για την ακρίβεια, δεν είναι απλά δύσκολο, αλλά *αδύνατο* να γίνει μία τέτοια κατασκευή. Ας δούμε, όμως, βήμα-βήμα, που βρίσκεται όλη αυτή η δυσκολία.
Read 12 tweets
Calculus, Pythagoras theorem, and other equations driving you crazy?

AppsHive has listed down 𝐌𝐚𝐭𝐡𝐬 𝐅𝐨𝐫𝐦𝐮𝐥𝐚 𝐀𝐩𝐩𝐬 required by beginners, intermediate and expert level mathematicians

#appshivrecommends #maths #Math #Mathematics #mathematician #apps

A thread📜
1) @symbolab

What we liked:🤩

👉Have a private tutor for every math problem step by step
👉Provide step-by-step detailed explanations
👉Has 100+ most powerful and different types of calculators to use
👉Fast calculations, shows steps, has an option to check your answer
2) @mathway

What we liked:🤩

👉Can snap or crop and paste the photo of any math problem
👉You can choose between multiple subjects
👉Provides an instant graph of your problem
👉Provide books and the teacher video lectures
Read 7 tweets
How much #Maths is needed in Private Equity (also when compared to Hedge Funds or Investment Banking for example)?
@CAIAAssociation @CAIA_Blog
Private Equity requires a good understanding of Finance and especially sector-specific finance such as Real Estate Finance Investments
In my opinion, the techniques used to model PE transactions have a lot in common with those that are applied to Listed Equity.
It has some maths in it, but nothing out of the world!
Unless you are doing financial risk management assignments, which means you will be applying the standard tools that are used elsewhere, such as #VaR ( translates into ICAR - Invested capital at risk in the PE Industry).
Read 10 tweets
🎉Le week-end prochain, c'est @PlayAzur à Nice pour rencontrer vos vulgarisateurs préférés.
Le @cafe_sciences et l'@Asso_Conscience y seront en S1 et S2
Le #CollectifConscience y fera même PLEIN de 🔴#live

#PAF2022 #twitch #vulgarisation #science #IRL ImageImage
@PlayAzur @cafe_sciences @Asso_Conscience Staring, from Z -> A (et pkoi pas) : @VChabrette, @TheoRooot, @spasdelou, @Space_Thomalice, @robin_isnard, @EleoBellot, @aetiom, et sans doute plein d'autre, avec le programme en cours de finalisation.

#PAF2022 @PlayAzur #twitch #vulgarisation Image
Read 58 tweets
There is a beautiful way to derive the famous Euler’s formula!

In this🧵, I’ll explain a visual, intuitive derivation. It’ll fit into a single picture at the end.

#iteachmath #MTBoS #math #maths #Mathematics An equation with 𝑒^(𝑖𝑡) on ...
This is Thread 3 in a series, but don't worry! This thread is self-contained.
In Thread 1, we saw applications of a mass on a spring.

We solved for its future position, at time 𝑡. This led to 𝑒^(𝑖𝑡), but 𝑖 is "imaginary."

The position along the ground had to be “real,” so we sought to interpret 𝑒^(𝑖𝑡) in terms of real numbers.
Read 19 tweets
When I trained as a scientist, #programming was a required tool in some select areas of #physics & #maths but not much beyond that…

That's no longer the case. #Coding is rapidly becoming a must-have skill in all scientific fields

Read on…



In recent years, I have introduced #Python #coding to chemists, biologists, psychologists, medical scientists, geologists, well, the list goes on.

Suffice to say that it spans all areas of science.


All of these teams and individuals realise that either they have large amounts of data they need to analyse in all sorts of different ways, or they need to simulate experiments and create computational models.

#Python is often the language of choice in many of these fields.

Read 4 tweets
The @educationgovuk #WhitePaper is here. Look out for our tweets summarising the key information you need to know
1) Ambitions for #english and #maths outcomes by 2030: 90% of primary children to achieve ARE in reading, writing and maths and the percentage of children meeting ARE in "the worst performing areas" to have increased by 1/3.
2) At secondary, the national average GCSE grade for both English Language and Maths to have increased from 4.5 to 5.
Read 34 tweets
Disaster thread recompiled here;

It's all mathematical from the first accident to the last. Image
The first accident involving damages on people occured 17/1/2008 (ddmmyyyyy)
1+7+1+20+8 = 37

37 is the 12th prime and also a twin prime.
73 is the 21st prime.

37><73 7+7+7 = 21. Except 47° that got injured you will see where this is going. #boening777
29/7/2011 was the 210 day of the year. 7+7+7 = 21.

Also 29+7+11 = 47°
Read 15 tweets
Quand je dis aux gens que j'étudie les #maths, leur première réaction relève souvent du dégoût, sur l'air de "j'ai toujours détesté ça 🤮".
Et pourtant, les mathématicien·ne·s trouvent leur discipline amusante, voire belle 🤯
Petit thread sur l'esthétique des #maths ⬇️ (1/N)
La recherche en maths vise à établir de nouveaux résultats, aussi appelés "théorèmes", qui éclairent le comportement de certains objets. Le théorème de Pythagore, par exemple, nous renseigne sur les propriétés de certains triangles. (2/N)
Bcp de résultats mathématiques sont très utiles dans la pratique, mais ce n'est pas toujours ce qui motive les chercheur·se·s.
Nous attendons aussi une satisfaction esthétique de notre travail, qu'elle soit liée à la beauté d'un théorème ou à l'élégance de sa preuve. (3/N)
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PEOPLE OF SPACE! I’m super excited to be hosting this week! We’ll be covering a bunch of topics that are near and dear to me including #space (obviously), astronomy, supernovae, radio astronomy, science communication, and MORE
#science #scicomm #spacetwitter #intro #Thread
But who is this random dude yelling at us about space?
Well the short version is that I’m a physicist who finished high school with every intention of becoming a lawyer - pictured is 19yo me not caring about science
#accidentalscientist #accidentalphysicist #throwback #SPACE 10 years ago before I had considered a career in science - I
For a slightly longer version you can check out this #thread I did on my @funfactscience account recently to reintroduce myself to #spacefam and any newcomers to my page
#introductions #spacetwitter #space
Read 7 tweets
¿Sabés que es la REGLA DE TRES? 🤔

¿Sabés para qué se usa? ¿Cuál es el razonamiento detrás del procedimiento?

¿Sabés cuándo no hay que usarla?

No te preguntes más, seguí leyendo este hilo que lo comento 🧵

#matematicas #mathematics #maths Image
Antes de hablar de la regla de tres, es necesario comprender el concepto de razón y de proporcionalidad. En los siguientes tuits voy a hacer referencia a ello, para luego explicar la regla de tres. Es importante no saltearse este paso.

Qué es una razón o ratio? Image
De la mano de las razones o ratios, pasamos al concepto de proporcionalidad, que es clave para entender la regla de tres. Image
Read 12 tweets
I have met many mathematicians, #engineers, and #statisticians, from different countries, but, the ones that are graduates of #French and Belgian Universities are probably the best that I have come across.
What makes these countries so proficient when it comes to teaching #maths?
During the early 1990s, most of the #Quants and Financial Engineers who joined the Financial Services industry in the City of #London came from France.
French Mathematicians changed the way banking & asset mgmt was done.
Actuaries at @CityUniLondon dominated Insurance
Neither @LBS nor @LSEEcon contributed to the development of the #Quantitative Finance or #Actuarial Science Professional Cultures in the City.
The major contributors were @hwugradfutures and @CityUniLondon
To date, LBS does not teach Financial Engineering as a pathway
Read 6 tweets
1/4 A new coefficient of correlation #maths #statistics


Introduces Chatterjee correlation coef which is 0 if the vars are independent and 1 if one is a measurable function of the other, and is computationally efficient to compute O(nlog n).

🧵👇 Image
2/4 Animation comparing it with linear correlation


Hacker news discussion…

Reddit /r/ML discussion…

Reddit /r/math discussion…
Read 4 tweets
Forex reserves supply should be matched by domestic money supply to counter inflation.
If NFA grows, the monetary base will grow
If NFA falls, the monetary base will fall
That is how a currency board system should work.
The local monetary policy is tied to an anchor currency.
The monetary base has two components
NFA Net Foreign Assets
NDA Net Domestic Assets
NDA +NFA = Monetary Base
What #Turkey needs is to #peg its currency to an anchor currency.
#Currency Peg can be fixed or crawling.
They can follow many examples, with or w/o capital #controls.
It can choose from an expansive list that includes Malaysia, Nigeria, Argentina, Hong Kong or those in the GCC.
Read 13 tweets
Passion project time! I love the HP-45 #calculator. It's beautiful on the outside, but I wanted to show people that it's beautiful on the inside, too. So, as a #coding & #retrocomputing challenge I wrote a simulator, & I'm now making it available to all. (Retweets welcomed.) 1/7 Image
The simulator was designed for the Z80-MBC2, a computer designed by @Just4Fun_J4Fun with a #Z80 processor running CP/M. (If you like #retrocomputing, do try it.) But after some tedious wrangling, I was able to write code which also compiled for Windows, Linux & MacOS. 2/7 Image
I like the sense of retro-tech and (unfulfilled) futures which the terminal application provides: it's a #hauntological calculator. It's also flexible: you can change what's shown on the display &, for slower machines (say, an 8MHz Z80), you can run in minimal mode for speed. 3/7 Image
Read 8 tweets

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