Angel "Java" Lopez en Blog

Diciembre del 2019


Publicado el 31 de Diciembre, 2019, 14:20

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Erdős–Rényi_model
https://en.wikipedia.org/wiki/Erdős–Rényi_model

Matthias Goerner made an in-space viewer for hyperbolic 3-manifolds
https://twitter.com/henryseg/status/1211226130167910400

The Central Limit Theorem and its misuse
https://lambdaclass.com/data_etudes/central_limit_theorem_misuse/

Transportation theory (mathematics)
https://en.wikipedia.org/wiki/Transportation_theory_(mathematics)

Gaspard Monge
https://en.wikipedia.org/wiki/Gaspard_Monge

Compositionality First Issue
https://johncarlosbaez.wordpress.com/2019/12/30/compositionality-first-issue/

Compositionality Journal
https://compositionality-journal.org/

Start with 82 and go backwards to 1
https://twitter.com/fermatslibrary/status/1197153129646694406

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 29 de Diciembre, 2019, 11:35

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In 1919, Viggo Brun proved that the sum of the reciprocals of twin primes converges to Brun's constant
https://twitter.com/fermatslibrary/status/1189900586365464588

Computer Science and Biology Explore Algorithmic Evolution
https://www.quantamagazine.org/computer-science-and-biology-explore-algorithmic-evolution-20181129/

Stackelberg competition
https://en.wikipedia.org/wiki/Stackelberg_competition
 
James Sylvester
https://twitter.com/johncarlosbaez/status/1191041537531973632

Why the Sum of Three Cubes Is a Hard Math Problem
https://www.quantamagazine.org/why-the-sum-of-three-cubes-is-a-hard-math-problem-20191105/

158,962,555,217,826,360,000 (Enigma Machine) - Numberphile
https://www.youtube.com/watch?v=G2_Q9FoD-oQ&feature=youtu.be

Neutrinos Lead to Unexpected Discovery in Basic Math
https://www.quantamagazine.org/neutrinos-lead-to-unexpected-discovery-in-basic-math-20191113/

La física de los neutrinos inspira cómo calcular los autovectores de matrices hermíticas
https://francis.naukas.com/2019/11/14/la-fisica-de-los-neutrinos-inspira-como-calcular-los-autovectores-de-matrices-hermiticas/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 28 de Diciembre, 2019, 15:49

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A Proof from "The Book": The limit of sin(x)/x as x → 0
https://twitter.com/TamasGorbe/status/1207788896622403584

The determinant is log-concave function
https://twitter.com/gabrielpeyre/status/1210440170530463744

John ellipsoid
https://en.wikipedia.org/wiki/John_ellipsoid

Musical Isomorphism
https://en.wikipedia.org/wiki/Musical_isomorphism

Problem 2
https://solvemymaths.com/2015/01/19/proof-problem-2/

About Yoneda Lemma
https://twitter.com/davidad/status/1210308612276408320

Go Cellular Automata
http://xahlee.info/cmaci/ca/go_cellular_automata.html

Knitting, Chinese Knots, Braid Theory
http://xahlee.info/math/math_knitting_chinese_knots.html

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 25 de Diciembre, 2019, 13:26

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Fast Fourier Transform
https://en.wikipedia.org/wiki/Fast_Fourier_transform

Visual Knitting Machine Programming
https://www.youtube.com/watch?v=9ms5uEUC_js

Anudado espontáneo de una cuerda agitada
https://twitter.com/emmaiarussi/status/1209554742441062402

Spontaneous knotting of an agitated string
https://www.pnas.org/content/104/42/16432

In any category we can define the concepts of "product" and "coproduct"
https://twitter.com/johncarlosbaez/status/1206257622480904193

Posible demostración de la veracidad de la conjetura ABC
https://www.gaussianos.com/posible-demostracion-de-la-veracidad-de-la-conjetura-abc/

Hay funciones continuas que no son derivables en ningún punto
https://twitter.com/pgroisma/status/1189877205960183808

Mathematicians Cut Apart Shapes to Find Pieces of Equations
https://www.quantamagazine.org/mathematicians-cut-apart-shapes-to-find-pieces-of-equations-20191031/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 24 de Diciembre, 2019, 11:52

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Revisiting Ramanujan
https://blogs.royalsociety.org/history-of-science/2018/10/02/revisiting-ramanujan/

Circular law for random matrices
https://www.johndcook.com/blog/2018/07/27/circular-law/

Wigner's Semicircle Law
http://mathworld.wolfram.com/WignersSemicircleLaw.html

Random Matrices: The circular Law
https://arxiv.org/abs/0708.2895

Montgomery's pair correlation conjecture
https://en.wikipedia.org/wiki/Montgomery%27s_pair_correlation_conjecture

Bayes theorem, and making probability intuitive
https://www.youtube.com/watch?v=HZGCoVF3YvM&feature=youtu.be

A practical type theory for symmetric monoidal categories
https://twitter.com/johncarlosbaez/status/1209177768241483776

The Year in Math and Computer Science
https://www.quantamagazine.org/quantas-year-in-math-and-computer-science-2019-20191223/

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 22 de Diciembre, 2019, 17:14

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‘Noise’ in the Brain Encodes Surprisingly Important Signals
https://www.quantamagazine.org/noise-in-the-brains-vision-areas-encodes-body-movements-20191107/

Longevity Linked to Proteins That Calm Overexcited Neurons
https://www.quantamagazine.org/longevity-linked-to-proteins-that-calm-overexcited-neurons-20191126/

Penrose diagrams
https://twitter.com/JannaLevin/status/1199042297087897600

Generador hardware de números aleatorios más rápido del mundo, basado en un diodo láser en régimen caótico
https://francis.naukas.com/2009/07/16/generador-hardware-de-numeros-aleatorios-mas-rapido-del-mundo-basado-en-un-diodo-laser-en-regimen-caotico/

The Inspection Paradox is Everywhere
https://towardsdatascience.com/the-inspection-paradox-is-everywhere-2ef1c2e9d709

Imágenes icónicas de la ciencia
https://twitter.com/SdeStendhal/status/1165926802474393601

Why an Old Theory of Everything Is Gaining New Life
https://www.quantamagazine.org/why-an-old-theory-of-everything-is-gaining-new-life-20180108/

¿Eran los dinosaurios como los hemos imaginado?
https://www.vozpopuli.com/altavoz/next/dinosaurios-imaginado_0_1067294935.html

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 21 de Diciembre, 2019, 14:41

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Can maths predict the universe?
https://www.prospectmagazine.co.uk/arts-and-books/the-universe-speaks-in-numbers-graham-farmelo-marcus-chown

Un horizonte sin límites clave para la humanidad
https://www.lanacion.com.ar/sociedad/un-horizonte-sin-limites-clave-para-la-humanidad-nid2311527

A group of our Homo erectus ancestors suffered a mysterious mass death more than 107,000 years ago. It's their last appearance in the fossil record
https://www.businessinsider.com/homo-erectus-mass-death-java-2019-12

Where is comet Borisov?
https://www.nytimes.com/interactive/2019/12/07/science/comet-borisov-tracker.html

Even In A Quantum Universe, Space And Time Might Be Continuous, Not Discrete
https://www.forbes.com/sites/startswithabang/2019/11/08/even-in-a-quantum-universe-space-and-time-might-be-continuous-not-discrete/#59ac6eb23598

Neutrinos Lead to Unexpected Discovery in Basic Math
https://www.quantamagazine.org/neutrinos-lead-to-unexpected-discovery-in-basic-math-20191113/

Black hole 'so big it should not exist' has been discovered
https://news.sky.com/story/black-hole-so-big-it-should-not-exist-has-been-discovered-11873235

Paul Dirac and the Nobel Prize in Physics
https://physicstoday.scitation.org/doi/10.1063/PT.3.4342

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Por ajlopez, en: Ciencia

Publicado el 20 de Diciembre, 2019, 17:00

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Evariste Galois
https://www.youtube.com/watch?v=BAmhQle-uvA

Hipatia la verdad en las matemáticas
https://www.gaussianos.com/comic-hipatia-la-verdad-en-las-matematicas/

A problem of Ramanujan
https://fermatslibrary.com/s/a-problem-of-ramanujan

Mathematician makes Euler equations blow up
https://www.quantamagazine.org/mathematician-makes-euler-equations-blow-up-20191218/

John Baez December 15th, Category Theory
http://math.ucr.edu/home/baez/diary/december_2019.html#december_15

Is there a set with 2.5 elements?  No!  But here's a "groupoid" with 2.5 elements
https://twitter.com/johncarlosbaez/status/1207711861732335616

Engel relations in 4-manifold topology
https://arxiv.org/abs/1412.5024

What color is Shinoy"s hat?
https://twitter.com/brilliantorg/status/1207299869846724608

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 15 de Diciembre, 2019, 12:32

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To colour any map on a torus you just need 7 colours
https://twitter.com/fermatslibrary/status/1185541866080624640

El artículo de matemáticas que Terence Tao publicó con solo 8 años
https://francis.naukas.com/2019/12/08/el-articulo-de-matematicas-que-terence-tao-publico-con-solo-8-anos/

Infinitve Powers
https://twitter.com/unbalancedparen/status/1203786359409917958

La Estadística o el curso para sacar muelas
http://anabelforte.com/2019/12/03/la-crisis-de-la-significatividad-estadistica/

Galactic Algorithm
https://en.wikipedia.org/wiki/Galactic_algorithm

Van Emde Boas tree
https://en.wikipedia.org/wiki/Van_Emde_Boas_tree

¿Por qué el caso n=4 es tan importante? Fermat
https://www.gaussianos.com/¿por-que-el-caso-n4-es-tan-importante/

Inverse distance weighting
https://en.wikipedia.org/wiki/Inverse_distance_weighting

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 14 de Diciembre, 2019, 16:34

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III Carnaval de Matemáticas: Toda la verdad sobre la anécdota de Gauss, el niño prodigio, su profesor y la suma de 1 a 100
https://francis.naukas.com/2010/04/15/iii-carnaval-de-matematicas-toda-la-verdad-sobre-la-anecdota-de-gauss-el-nino-prodigio-su-profesor-y-la-suma-de-1-a-100/

This question was asked by Toeplitz in 1911 and remains unsolved to this day
https://twitter.com/fermatslibrary/status/1204400428554838021

Who cares about topology? (Inscribed rectangle problem)
https://www.youtube.com/watch?v=AmgkSdhK4K8

"Screw theory" was invented by a guy named Ball
https://twitter.com/johncarlosbaez/status/1185234370690310144

Benford's law
https://twitter.com/fermatslibrary/status/1185179983939096580

A Collector of Math and Physics Surprises
https://www.quantamagazine.org/tadashi-tokieda-collects-math-and-physics-surprises-20181127/

From open learners to open games
https://arxiv.org/abs/1902.08666

Cross-sections of a regular octahedron
https://twitter.com/brilliantorg/status/1185541449963704320

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 10 de Diciembre, 2019, 14:48

Se termina el año. Repaso de las resoluciones del mes anterior:

- Escribir sobre Matemáticas [pendiente]
- Escribir sobre Física [pendiente]
- Escribir sobre Historia de las Matemáticas [pendiente]
- Escribir sobre Historia de la Ciencia [pendiente]
- Estudiar blues en guitarra [completo]
- Estudiar dibujo/pintura [completo] evidencia

Las resoluciones para el nuevo mes:

- Escribir sobre Matemáticas
- Escribir sobre Física
- Escribir sobre Historia de las Matemáticas
- Escribir sobre Historia de la Ciencia
- Estudiar blues en guitarra
- Estudiar dibujo/pintura

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
http://twitter.com/ajlopez

Publicado el 8 de Diciembre, 2019, 13:11

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Why mathematicians just can"t quit their blackboards
https://www.theguardian.com/artanddesign/2019/oct/12/mathematicians-blackboards-academics-photographer-jessica-wynne-do-not-erase

Villani and Ávila: Two Men that Count
https://news.cnrs.fr/articles/villani-and-avila-two-men-that-count

A Different Way to Solve Quadratic Equations
https://www.youtube.com/watch?v=ZBalWWHYFQc

"Para hacer matemáticas no hace falta ser un bicho raro"
https://elpais.com/elpais/2019/11/25/ciencia/1574678450_142554.html

How Randomness Can Arise From Determinism
https://www.quantamagazine.org/how-randomness-can-arise-from-determinism-20191014/

The Mandelbulb
https://twitter.com/Rainmaker1973/status/1184424960523227137

Three number systems
https://twitter.com/johncarlosbaez/status/1184492139897507840

The Laplace Transform
https://archive.org/details/in.ernet.dli.2015.201038

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 7 de Diciembre, 2019, 11:40

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El sentido de la vida, el universo y todo lo demás… resuelven x³+y³+z³ = 42
https://francis.naukas.com/2019/09/07/el-sentido-de-la-vida-el-universo-y-todo-lo-demas-resuelven-x³y³z³-42/

Fourier was trying to do something completely unrelated when he stumbled on Fourier series
https://twitter.com/AlexKontorovich/status/1171519369089667072

El "icónico" número 42 ya se sabe expresar como de tres cubos enteros
https://www.gaussianos.com/el-iconico-numero-42-ya-se-sabe-expresar-como-suma-de-tres-cubos-enteros/

Enumerative Geometry Genealogy (Or The Sex Life of Points and Lines)
https://twitter.com/johncarlosbaez/status/1179135794478321664

La conjetura de Steinberg es falsa
https://www.gaussianos.com/la-conjetura-de-steinberg-es-falsa/

Outside In, Turning Number
https://www.youtube.com/watch?v=wO61D9x6lNY

Sphere Eversion
https://en.wikipedia.org/wiki/Sphere_eversion

The Lambda Calculus is Algebraic
https://www.mscs.dal.ca/~selinger/papers/combinatory.pdf

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez

Publicado el 1 de Diciembre, 2019, 17:06

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Mathematicians Catch a Pattern by Figuring Out How to Avoid It
https://www.quantamagazine.org/mathematicians-catch-a-pattern-by-figuring-out-how-to-avoid-it-20191125/

Applied Category Theory (@ MIT 2019)
https://www.youtube.com/playlist?list=PLhgq-BqyZ7i5lOqOqqRiS0U5SwTmPpHQ5

The Tautochrone is a cycloid curve.
https://twitter.com/fermatslibrary/status/1168147502081687553

Advection
https://en.wikipedia.org/wiki/Advection

Mean Field Theory
https://en.wikipedia.org/wiki/Mean_field_theory

Maths in Philosophy
https://medium.com/@alexanderdouglas/maths-in-philosophy-b2e807edf045

I hope you will enjoy this integral as much as I did
https://twitter.com/InertialObservr/status/1199567675095052288

42 como suma de tres cubos, gracias a Andrew Booker (Univ. Bristol) y Andrew Sutherland (MIT), 6 sep 2019
https://twitter.com/emulenews/status/1170087665850601479

Nos leemos!

Angel "Java" Lopez
http://www.ajlopez.com
https://twitter.com/ajlopez