X

+

1:00 AM | Packing Smoothed Octagons

Which shape is worst of all for packing the plane? That is, which has the lowest maximal packing density? Suppose we demand that our shape be convex and also centrally symmetric: that is, a subset $S \subseteq \mathbb{R}^2$ such that $x \in S$ implies $-x \in S$. Then a certain 'smoothed octagon' is conjectured to be the worst. Amazingly, this shape has a 1-parameter family of maximally dense packings, shown in this image created by Greg Egan.

+

8:00 PM | Adrien-Marie Legendre

Portrait of the great mathematician Adrien-Marie Legendre, painted in 1820. Adrien-Marie Legendre (French pronunciation: [adʁiɛ̃ maʁi ləʒɑ̃ːdʁ]) (18 September 1752 – 10 January 1833) was a French mathematician. Legendre made numerous contributions to mathematics. Well-known and important concepts such as the Legendre polynomials and Legendre transformation are named after him. [...]

+

7:43 PM | Without Haste

Without Haste (2003)
album cover of the Russian rock-group Voskresenie
http://im-possible.info/english/art/misc/cd/voskresenie.html

+

5:18 PM | Monstrous Math Video

Having issues with the video? Try the audio-only feed using the player below! Susan Cantey is at it again! This time she had help from her two granddaughters on creating this song! The song is a mathematical parody of "Monster Mash" by Bobby (Boris) Pickett You can find this on YouTube at youtu.be/ZSo0JcpffTk!If you like this song, be sure to find Susan Cantey's other works on Spotify, iTunes, and CD Baby! [...]

+

3:58 PM | Happy Halloween!

We at Calculus Humor will like to wish everyone a happy and safe Halloween! [...]

+

11:25 AM | Relative size of astronomy stuff

Look! More size of very big things with large numbers, compared against things that you're kind of familiar with. Does …Tags: astronomy, scale

Editor's Pick

+

7:32 AM | Prostitution, GDP, and £1.7 billion due

David Spiegelhalter, professor of public understanding of risk, does some back-of-the-napkin math to describe why recent prostitution estimates for the …Tags: prostitution, taxes, uncertainty

+

5:00 AM | Decomposing Numbers

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.They're decomposing numbers ... there's less of them every year ... Happy Halloween!

+

twocubes:
anewkindofmagic:
twocubes:
aeneida:
twocubes:
cute!
I want to prove this but I don’t know where to start
hint:
I got in quite a mess of algebra when I did this. Curse the sum of squares formula and all its works.
Alternate way I found: consider the pairs of squares on both sides , starting with the largest. Take the smaller from the bigger, and add these differences. We want to prove that this is equal to the square of n(2n+1). For instance, (14^2-12^2)+(13^2-11^2)=10^2.
[…]

+

5:06 PM | Cover of Estado de Minas

Cover of Brazilian magazine Estado de Minas
http://im-possible.info/english/art/covers/magazine-estado-de-minas.html

+

10:21 AM | Decline of women in computer science

NPR spent some time on the subject of the decline of women in computer science. Whereas the the percentage of …Tags: computer science, gender, NPR

+

7:32 AM | Chess piece survival rates

On Quora, someone asked, "What are the chances of survival of individual chess pieces in average games?" Oliver Brennan answered …Tags: chess, survival rate

+

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.Secant you will find what Man was Not Meant to Know.

+

7:34 PM | Chain

Chain
by Andreas Aronsson
http://im-possible.info/english/art/computer/andreas-aronsson.html#chain

+

7:01 PM | Statistically ignorant

Ipsos MORI, primarily a marketing research group I think, released results of their study on public perception of demographics versus …Tags: ignorance, world

+

10:01 AM | Halloween costume rankings

Accompanying their segment on Halloween stores stocking costumes, NPR ranks bestsellers for the past four years, based on data from …Tags: costume, Halloween, ranking

+

9:05 AM | Breakout detection in R

Say you have time series data and you want to detect significant changes, but there's also a lot of noise …Tags: changes, time series, Twitter

+

5:00 AM | Math Horror Movies: Little Shape

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.You don't meet nice shapes on Skid Row. Don't feed the plant! Plus a Constant.

+

mathematica:
iwasateenagefaery:
joanne-and-deans-bacon:
I’M SAVING THESE TO FUCK WITH PEOPLE’S BRAINS
I just love the boy’s reactions i keep imagining a little boy screaming bedtime paradox and then immediately falling to sleep
I see you, Bertrand Russell.

+

Reddit AMA happening now here https://twitter.com/jamesgrime/status/527204677050703872

+

7:08 PM | Roots and Branches

Roots and Branches
by Vlad Alexeev
http://im-possible.info/english/art/computer/vlad.html#roots-and-branches

+

4:45 PM | Hey, apparently I’ll be doing one of those Reddit Ask Me Anythings at 9pm GMT (5pm ET)....

Hey, apparently I’ll be doing one of those Reddit Ask Me Anythings at 9pm GMT (5pm ET). I’ll try and provide a link later.

+

7:50 AM | Neurons conversing

Adam Cohen and his group are using genetically-modified neurons that light up when the cells activate to see the communication …Tags: brain, New Scientist

+

7:11 AM | Affordable Care Act progress report

The New York Times takes a data-centric look at the progress of the Affordable Health Care Act here in the …Tags: health care, New York Times

+

5:00 AM | Math Horror Movies: Attack!

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.It's got a Killer soundtrack and high Rotten Tomatoes score!

+

1ucasvb:
Affine transformations preserve parallel lines, and include rotations, scaling, shears and translations. Linear transformations can’t perform translations, but this can be achieved if we go to a higher dimension.
In this animation, a planar (2D) shape lying on the plane z = 1 is translated by means of a linear transformation in three dimensions: a shear along the z axis.
Rotations can be performed normally, also around the z axis. For rotations around any other axis parallel to
[…]

Sidebar

Filters

+

Winifred Edgerton Merrill fu la prima americana ad ottenere un dottorato in matematica presso la Columbia University nel 1886. Nella sua tesi sviluppò una rappresentazione geometrica degli infinitesimi in diversi sistemi di coordinate, utilizzando lo jacobiano per per derivare le trasformazioni tra gli integrali nei diversi sistemi.Tra matematica e astronomiaNata a Ripon, nel Wisconsin, il 24 settembre del 1862 da Emmet e Clara Edgerton, si trasferisce con la famiglia a New York intorno al […]

Kelly S.E. & Rozner S.A. (2012). Winifred Edgerton Merrill: "She Opened the Door", Notices of the American Mathematical Society, 59 (04) 504-512. DOI: http://dx.doi.org/10.1090/noti818

Citation

+

Winifred Edgerton Merrill fu la prima americana ad ottenere un dottorato in matematica presso la Columbia University nel 1886. Nella sua tesi sviluppò una rappresentazione geometrica degli infinitesimi in diversi sistemi di coordinate, utilizzando lo jacobiano per per derivare le trasformazioni tra gli integrali nei diversi sistemi.Tra matematica e astronomiaNata a Ripon, nel Wisconsin, il 24 settembre del 1862 da Emmet e Clara Edgerton, si trasferisce con la famiglia a New York intorno al […]

Kelly S.E. & Rozner S.A. (2012). Winifred Edgerton Merrill: "She Opened the Door", Notices of the American Mathematical Society, 59 (04) 504-512. DOI: http://dx.doi.org/10.1090/noti818

Citation

+

Direi che oggi pomeriggio è stato un bel respirare, al Palazzo Brera. Cristina Lazzeroni dell'Università di Birmingham è venuta alle 18 (come avevo scritto nel post precedente) per raccontare del bosone di Higgs, del modello standard e di materia e antimateria. E' una sperimentale presso l'esperimento LHCb al CERN, l'esperimento dedicato proprio alla ricerca su uno dei grandi misteri dell'universo: perché in esso c'è un eccesso di materia (e d'altra parte se non fosse così, non ci sarebbe […]

Aaij R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander & S. Ali & (2013). First Observation of CP Violation in the Decays of B_{s}^{0} Mesons, Physical Review Letters, 110 (22) DOI: http://dx.doi.org/10.1103/physrevlett.110.221601

Citation

+

Per i I cieli di Brera, il 24 settembre (domani... scusate per il ritardo nell'annuncio...) alle 18 presso la Sala delle Adunanze dell'Istituto Lombardo nel Palazzo Brera sito in via Brera 28 (Milano), si terrà la conferenza La fisica delle particelle e il Large Hadron Collider: recenti sviluppi e questioni aperte: Cristina Lazzeroni ci introdurrà alla fisica delle particelle e agli studi fatti al Large Hadron Collider del Cern di Ginevra mettendo l’accento su recenti sviluppi come la
[…]

Aad G., J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, S. H. Abidi, M. Abolins, O. S. AbouZeid & H. Abramowicz & (2014). Measurement of the Higgs boson mass from the $H\to \gamma \gamma $ and $H\to Z{Z}^{*}\to 4\ell $ channels in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector, Physical Review D, 90 (5) DOI: http://dx.doi.org/10.1103/physrevd.90.052004

Citation

+

One of the exciting things about mathematical oncology is that thinking about cancer often forces me to leave my comfortable arm-chair and look at some actually data. No matter how much I advocate for the merits of heuristic modeling, when it comes to cancer, data-agnostic models take second stage to data-rich modeling. This close relationship […]

Gallaher, J. & Anderson, A.R. (2013). Evolution of intratumoral phenotypic heterogeneity: the role of trait inheritance., Interface Focus, 3 (4) 20130016. arXiv: 1305.0524v1

Citation

MindAfterMath tweeted: @MindAfterMath

2014-11-01 11:37:01

gaussianos tweeted: @gaussianos

RT @buhardilla: Lanzamos la #pregunta114 : ¿Deben las matemáticas ser obligatorias en todas las carreras universitarias? Esperamos vuestra …

2014-11-01 11:20:33

rmathematicus tweeted: @rmathematicus

“@jenniebatchelor: My goal is for my study (and hair) to look like this by the end of the day. #ladysmag http://t.co/QlII1AlteZ”

2014-11-01 11:19:06

rmathematicus tweeted: @rmathematicus

“@dhayton: Hey @MedievalRobots, have you seen this video of a 450-yr-old automaton friar? http://t.co/vqIsL8Cemo HT @smithsonian”

2014-11-01 11:17:56

rmathematicus tweeted: @rmathematicus

RT @dhayton: This portolan chart http://t.co/8EjDO1V2Nw is remarkably similar to another 15th-c one: @rmathematicus @CaoimheWhelan http://t…

2014-11-01 11:16:57

rmathematicus tweeted: @rmathematicus

RT @HakluytSociety: Final reminder: The deadline for the Hakluyt Society Essay Prize for students and early career researchers is TODAY! ht…

2014-11-01 11:12:22

wpgaurav tweeted: @wpgaurav

Free unlimited PR8 / DA94 backlinks from Gravatar: http://t.co/P55FAmRVjX

2014-11-01 11:00:36

gaussianos tweeted: @gaussianos

Semana de relax - #AntologíaGaussiana http://t.co/QPKG3SBuZn

2014-11-01 11:00:12

X