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Posts

December 21, 2014

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10:21 AM | Arcos de Málaga: rebajado
Hola a todo el mundo! Aquí tenéis mi aportación para esta edición del Carnaval: http://elmundoderafalillo.blogspot.com.es/2014/12/arcos-de-malaga-rebajado.html Espero que os guste ;)

December 19, 2014

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11:58 AM | Ejemplo del principio de inducción en un tuit
El principio de inducción es, en matemáticas, como esas herramientas que no pueden faltar en una casa. Sirve para demostrar un montón de resultados, y es fácil de entender y manejar. Éste es un ejemplo para tuiteros, en 114 caracteres. (Sigue leyendo)
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11:40 AM | Suma de los Inversos de los divisores de números perfectos [Tito Eliatron Dixit]
Mi segunda aportación a #CarnaMat59 es Sobre números perfectos y los invesos de sus divisores
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9:05 AM | Weird integral whose simplicity is only apparent in the complex plane
Every so often we come across an integral that seems absolutely impossible on its face, but is easily attacked – in fact, is custom designed – for the residue theorem. I wonder why a first year complex analysis class doesn’t show off this case as Exhibit A in why the residue theorem is so bleeding’ […]
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8:51 AM | Premio #CarnaMat58 [Tito Eliatron Dixit]
Mi primera aportación a #CarnaMat59 es, precdisamente, el Premio #CarnaMat58.
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8:49 AM | Expansions of $e^x$
A very basic question was asked recently: What is a better approximation to $e^x$, the usual Taylor approximation, or a similar approximation involving $1/e^{-x}$? More precisely, given an integer $m$, which is a better approximation to $e^x$: $$f_1(x) = \sum_{k=0}^m \frac{x^k}{k!} $$ or $$f_2(x) = \frac1{\displaystyle \sum_{k=0}^m \frac{(-1)^k x^k}{k!}} $$ The answer is amazingly simple: […]
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12:19 AM | Comienza el carnaval navideño. Edición 5.9
Un año más Que no te aburran las M@tes aloja la edición de diciembre, ya sabes participa del 19 al 25 http://matesnoaburridas.wordpress.com/2014/12/15/carnaval-de-matematicas-edicion-5-9-enma-castelnuovo/

December 18, 2014

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6:00 PM | Your Upcoming Job Interview
Many of you are in the middle of the job search process and are going to have interviews pretty soon, so I wanted to offer some thoughts on how to prepare. I am hoping that other readers can add their … Continue reading →

December 14, 2014

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5:40 PM | convergent sequences are cauchy sequences proof
newest proof
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4:31 PM | convergent sequences are cauchy sequences
newest lemma
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3:15 PM | cauchy sequence
newest definition
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1:29 PM | sequences and limits convergent sequences
updated definition
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12:58 PM | sequences and limits
updated chapter
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9:23 AM | Geometric Construction
Animated processes of basic construction of regular geometric shapes with only a compass and a rule.

December 13, 2014

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7:51 PM | El épico juego de la vida de Conway [VÍDEO]
Puedes leer la entrada original aquí. Hace poco, por un tweet de Cliff Pickover, llegó a mí un vídeo espectacular del juego de la vida de Conway. Pero antes de enseñároslo, os quiero explicar un poco de qué va... [CONTINUAR LEYENDO EN SCIRE SCIENCE]
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7:51 PM | La serie armónica y la edad del Universo
En serio con la serie armónica... mi aportación para la edición 5.8 http://nomolestesmiscirculos.hol.es/?p=3511
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1:15 PM | sequence
newest definition

December 12, 2014

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6:50 PM | Quality of life matters
Winter break is the prime time for graduate students looking for postdoctoral or faculty positions to finish putting together their application documents and materials or even finish submitting them. Then in a few months the time to start visiting campuses, … Continue reading →

December 10, 2014

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9:14 PM | New GeoGebra Tablet Apps including 3D
Unser neues GeoGebra 5 mit 3D Ansich ist jetzt auch für Android Tablets und iPads verfügbar – und die Windows Store Version wird bald folgen!      Damit haben Sie nun die ganze GeoGebra Power, die Sie vom Laptop oder…Read more ›
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9:14 PM | New GeoGebra Tablet Apps with 3D
We are pleased to announce that our fully fledged GeoGebra 5 with 3D View is now also available for Android tablets and iPads. We’ve got a little more work to do before we can launch in the Windows Store, but…Read more ›

December 07, 2014

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2:30 AM | Graph Match
Matching activity for Linear Graphs and equations up to mixed polynomials in 3 levels.

December 05, 2014

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11:18 PM | Gangnam Style music video ‘broke’ YouTube view limit
YouTube said the video - its most watched ever - has been viewed more than 2,147,483,647 times. It has now changed the maximum view limit to 9,223,372,036,854,775,808, or more than nine quintillion.
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10:58 PM | 2014 Christmas Maths / Math Lessons
Seven Christmas-themed maths lessons. The Christmas Pixel Puzzle, Concentric Carol Circles, The Snowball Multidimensional Duel, The Right Wrapping, Straight Line Curve Christmas Cards, The Pentomino Present Packer, Negative Number Games

December 04, 2014

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9:44 AM | Self-checking Christmas Worksheet
This self-checking electronic worksheets contains seven sets of 10 questions: Operations, Word Operations, Order of Operations, Measurement, Rounding, Time, Percentages.

December 02, 2014

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7:45 PM | Infinite Fractions - Numberphile
Matt Parker on Stern-Brocot numbers, fractions and rational numbers.

December 01, 2014

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11:48 AM | Sierpinski Triangle
A template for creating a Sierpinski Triangle.

November 30, 2014

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4:46 PM | Paralaje
Paralaje nuestra píldora de matemáticas como nueva aportación en  Edición 5.8: Betty Scott del carnaval .http://pimedios.es/2014/11/27/paralaje/
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