#poincaré

[tagitables]

Later generations will regard Mengenlehre (set theory) as a disease from which one has recovered.

Henri Poincaré

[postcard-from-the-past]

Poincaré and Clémenceau in Metz, on the Celebration of getting Alsace and Lorraine back to France after the First World War

French vintage postcard, mailed in 1919

[lounesdarbois]

Les 4 premières minutes.

[soupedepates]

Looking at the fluctuating of the French franc in 1925-1926. 1 £ = 240FR on Dec 1925. 1£ = 124FR on Dec 1926.

POV you're in France in the mid1920, and in a year prices are cut in half. Now you're voting Poincaré forever and ever and fuck the Cartel des Gauches.

[superpte]

Relativity Simplified: Observer-Free Physical Construction For Clock Synchronization

We describe an Operational Physical Definition Of Synchronization, free of magical unlocal observations Abstract: Parroting Poincaré from 1900, Einstein used a non-operational retrospective definition of synchronicity of clocks for clocks in a rest frame, which requires a couple of observers. I propose instead an operational construction for generating synchronized clocks, starting with the one…

[lapuertaescrita]

Perelmán y el rompecabezas del milenio

¡Nueva entrada de la sección "Íconos", con un personaje que pasará a la historia por su ingenio y excentricidad!

Grigori Perelmán, joven. Fuente: George M. Bergman, año 1993. Oberwolfach Photo Collection. Reconocido internacionalmente como el desarrollador de la solución que permitió confirmar la conjetura de Poincaré; Grigori Perelmán es un excéntrico matemático ruso nacido en la Unión Soviética, en la década de los 60´s. A la fecha, se considera como una de las mentes más brillantes sobre la faz de la…

[francepittoresque]

PATRIMOINE | Maison Poincaré : le lieu où les maths prennent vie ➽ https://bit.ly/Maison-Poincare Sur 900 m2 au cœur de Paris, la Maison Poincaré a pour objectif de faire découvrir l’influence des mathématiques sur notre société et dans notre quotidien. Il est consacré aux mathématiques et à leurs interactions, en particulier en lien avec d’autres disciplines : physique, biologie, sociologie, sciences du numérique, sciences de l’environnement et du climat, économie, philosophie, arts...

[vicentefuentesrodriguez]

No se puede comprar todo -y menos a los OVNIS-

Un millón de dólares se le otorgaron al matemático Grigori Perelman al demostrar la conjetura de Poincaré 100 años después. No los recogió. "¿Si puedo dominar el universo de qué me sirven?" dijo. Hoy hablaré de ello a las 20:30 h. respecto al tema descontrolado tema OVNI.  https://youtu.be/qPeSrk7UQqU

[nicolae]

Henri Poincaré: Potential of an electric mass distributed on the surface of a sphere (2)

Suppose that we propose to find a function F which satisfies Laplace’s equation inside the sphere S and which, at the different points M of the surface of this sphere, take given values V°. The value of this function V at a point P inside the sphere will be the integral ∫(R2 – OP2)/4πr V°/MP3 extended to all the elements of the sphere. Let w and W be the smallest and the largest value that V°…

[philosophors]

“To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.”

— Henri Poincaré

[dirtyriver]

La fin de la "fée verte" (suppression de l'absinthe en Suisse)

Poster denouncing the absinthe ban in Switzeland by Albert Gantner, published in the magazine Guguss in 1910. Neuchâtel and Genève were the only cantons who voted against the prohibition of the "green fairy". Guguss had campaigned against the prohibition.

And a 1915 French poster:

[tagitables]

Heinrich Hertz, Henri Poncaré, David Hilbert, Bertrand Russell.

[tokinanpa]

I find it really funny that mathematicians are so bad at naming things when that's literally all they do

[fragmentedblade]

This seems to be a reference to Lorentz transformations? The first formula is apparently a derivation, and seems to be the inverse of the time part of the transformation (there's a space part too), for what I've been able to find.

The second formula is Newton's second law.

[dirichletttt]

I genuinely feel like math is like the closest thing we have to actual irl wizardry. It's an ancient field of study going back to the birth of civilization, and was actively studied by almost every civilization. It's an incredibly accurate tool for analyzing and predicting phenomena from the movement of galaxy clusters to the vibrations of quarks. But even beyond application, pure math is an impossibly deep field in and of itself, studied and passed down by hundreds of generations prior. You can even trace the connection of each mathematician to the ancients via the Mathematics Genealogy Project.

And we manipulate it with pen and paper. We make our own definitions, and follow their logical conclusions. There is no experimental evidence to adhere to. Nothing is handed down on high; you can really say anything that you want, it's just up to others to believe you. The notion that mathematics is just a set of rules to memorize is one of the worst things to come out of modern general education.

My point being, tell me that this isn't just the modern day version of a magical incantation:

[vieillesboutiques]

Cordonnerie, bar du marché, rue Raymond Poincaré, Villerupt, Meurthe-et-Moselle.