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3:28 PM | The Twelve Days of Christmas (Reprise)

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.Expressing my True Love mathematically and recursively. This comic calls to mind my Twelve Triangle Numbers of Christmas from way back in 2007. Once again, I used pseudo-code here, and not any particular programming language. I wouldn't program it exactly like this, but I wanted it to be readable. As for the summations, those actually caused me some problems -- or at least a bit of thought about how they
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Spotted on the Web: The Political Hat had a post about the Common Core in Jeopardy category. What makes this interesting is that there was an "Update" to the common with a link to my column from two weeks ago. (Yeah, me!) Maybe this is the reason that Michelle Malkin of Twitchy.com suddenly started following me out of the blue. (Double Yeah, me!) The fame is going full-circle. Or inside-out. Or something. Moving up from the H-list to the G-list. I'll be on the D-list before you know it! The
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8:11 PM | New works by Eugeny Matko

New enamel works by Eugeny Matko
http://im-possible.info/english/art/applied_art/eugeny-matko.html#burden

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It's always tough to pick my favorite visualization projects. I mean, it's a challenge to pick and rank your favorite anything really. So much depends on what you feel like at the time, and there's a lot of good work out there. Nevertheless, I gave it a go. Tags: best-of

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1:59 AM | (blog): Another Jeopardy Math Category

Just a couple weeks after Jeopardy had its Non-Common Core Math category during Kids Week, they ventured again into that academic field, but this time with adults. They fared a little better. For one thing, they made it through all five clues, including a Daily Double, and they didn't wait until everything else was exhausted. Unlike the kids' clues, these didn't all have to do with the numbers 1, 2, 3, 4, 5 being added and multiplied. The first question involved calculating a 20% tip on a
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8:14 PM | Impossible sqaure

Impossible square
by CareCube
http://im-possible.info/english/art/montage/carecube.html
Author - http://carecube.deviantart.com/

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8:26 AM | Collection of physical visualizations

I'm pretty sure there's a ton of untapped potential in data represented physically. Maybe not in the analytical insights sense …Tags: physical

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twocubes:
four-bar linkages, and how changing the length of the bars affects the motion in one particular case

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12:23 AM | Order of Operations Mnemonic

(Click on the comic if you can't see the full image.) (C)Copyright 2014, C. Burke.Remember to place all your holiday orders of operations early so they'll arrive in time ... and in the correct order.

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8:27 PM | Crop circle with impossible pentagram

Crop circle near Bedfordshire in June of 2003
http://im-possible.info/english/art/misc/crop-circles.html#bedfordshire

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11:52 AM | Using baseball bats to display data

When a baseball player is hitting well, commentators will sometimes say that it looks like he's hitting with a bigger …Tags: baseball, physical, sports

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maggie-stiefvater:
nevver:
What’s wrong with this picture?
I’ll tell you what’s wrong with this picture: assumption.
This picture has gone viral as thousands of people deliver searing indictments of both smartphones and teens.
I’ve met a couple of teens. I’ve had a couple smartphones. Could these teens be playing Angry Birds or texting stupid jokes to each other? Yeah, they could.
But they could also be googling provenance for that painting or taking a second to text a friend about
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Assisting today in a Geometry class. It was Day 2 of Arcs of a Circle. Yesterday, the teacher covered central angles with the class, which meant that today's lesson moved to the inscribed angles. She carefully and diligently explained what makes an inscribed angle, and how the line segments intercept an arc in a similar way that they saw in the previous lesson. And then we got into the relationship between the arcs and the two types of angles. The measure of an arc of a circle is equal to the
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curiosamathematica:This conference room is 11 units long and has three folding partitions at positions 2, 7 and 8. For a meeting of any given size, the room can be configured in exactly one way using this folding partitions. This makes it an example of a Golomb ruler, named for Solomon Golomb and discovered independently by Sidon and Babcock. These are sets of marks at integer positions along an imaginary ruler such that no two pairs of marks are the same distance apart.
The number of marks on
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11:22 AM | Increasing rates of men who don’t work

Recent data from the Census Bureau suggests the rate of non-working men has increased. As more women go to work …Tags: Amanda Cox, employment, Upshot

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As promised yesterday, more about my weekend meet-ups. On Friday Night, a gathering of #mathednyc took place at the offices of Offices of New Visions for Public Schools on West 13 Street in New York City, dubbed the #NYCMathTweetUp. I'm not sure how the capitalization worked with hashtags. Prior to the event, I read that n > 30 had RSVPed, where n is "the number of people interested". However, upon arrival, I discovered fewer than that made it there on a cold night, but this didn't discourage
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7:57 PM | Tragedy #469

Tragedy #469
by Benjamin Dewey
http://im-possible.info/english/art/cartoons/benjamin-dewey.html
Author - http://tragedyseries.tumblr.com/

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1:29 PM | When data gets creepy

You make and publish bits of data about yourself, intentionally and unintentionally, and it goes to the indexed public web …Tags: Ben Goldacre, privacy

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When you have your phone's Wi-Fi turned on, even if you're not connected to anything, you broadcast the networks you've …Tags: privacy, Wi-Fi

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twocubes:
visualizingmath:
twocubes, does this have anything to do with logarithmic spirals? A few years ago, I used a compass to draw something quite similar to this! It’s so interesting to see it in gif form, zooming in.
Anyway, cool gif!
more or less; you can view the points of tangency between the circles as being on a logarithmic spiral shaped like something like r=α2^(3tθ/2π) for some constant α (I think); basically the circular arcs that go from one point of tangency to the
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3:02 AM | (blog): It Was a Meet-Up Weekend

Until recently, I had a lot of make-up weekends, lost Saturdays and Sundays were I made-up the backlog of work that I let snowball from Monday to Friday (or the week or weeks before). However, this weekend was a Meet-up Weekend, where I got to meet up with people I didn't know personally beforehand, but now I can say I have. Warning: These meetups keep me out late -- not complaining. On the contrary, glad that I'm out of a rut. On the other hand, I haven't made up the sleep yet, so this is a
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twocubes, does this have anything to do with logarithmic spirals? A few years ago, I used a compass to draw something quite similar to this! It’s so interesting to see it in gif form, zooming in.
Anyway, cool gif!

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7:16 PM | Mystical artworks

Artworks by Paul Laffoley
http://im-possible.info/english/art/various/paul-laffoley.html
Artist - http://paullaffoley.net/

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9:36 AM | Tattoos with impossible triangles

Tattoos by Sean Danger Rhodes
http://im-possible.info/english/art/misc/tattoo/sean-danger-rhodes.html
Author - http://instagram.com/sean_danger_rhodes

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mindfuckmath:
Made to Order
Draw three circles of equal size and inscribe them with a pentagon, a hexagon, and a decagon.
The sides of these figures form a right triangle — and half of a golden rectangle.

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12:49 AM | (blog): Happy Consecutive Number Day!

It's seems like every day, like every number, has something special about it, but as George Orwell might've said, but wisely chose not to, "Some dates are more special than others". (Had he said something about some numbers being more equal than others, that could've been a problem, but would've fit well into his theme. But that's a subject for another blog post.) Today is Consecutive Number Day because it is 12/13/14. We've had a Consecutive Number Day for each of the past 11 years -- TWO, if
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Stupiti che 1 non sia primo? Scopriamo insieme perché è "solo" l'unità!Abbiamo già visto come, partendo dai numeri primi, si possa sviluppare un discorso più o meno approfondito sulle fondamenta matematiche. Altrettanto fondamentale, però, si rivela provare a rispondere alla domanda su quale sia il numero primo più piccolo. E', infatti, abbastanza noto come il numero 1 sia stato ora inserito ora escluso dalla lista dei numeri primi, ottenendo in alcuni casi lo status di più piccolo tra […]

Agargun A.G. & Fletcher C.R. (1997). The Fundamental Theorem of Arithmetic Dissected, The Mathematical Gazette, 81 (490) 53-57. DOI: http://dx.doi.org/10.2307/3618768

Crandall R. & Pomerance C.B. (2005). Primes!, Prime Numbers, Prime numbers: a computational perspective 1-82. DOI: http://dx.doi.org/10.1007/0-387-28979-8_1

Caldwell C.K. & Xiong Y. (2012). What is the smallest prime?, Journal of Integer Sequences, 15 arXiv: 1209.2007v2

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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

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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

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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

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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
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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

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fawnpnguyen tweeted: @fawnpnguyen

@nik_d_maths Oy. Eagles.

2014-12-21 00:33:48

bobloch tweeted: @bobloch

Bradley Fletcher's pass defense technique = me avoiding a swarm of bees

2014-12-21 00:14:51

MindAfterMath tweeted: @MindAfterMath

2014-12-20 23:46:18

andrescaicedo tweeted: @andrescaicedo

RT @costofknowledge: WriteLaTeX is renaming itself as Overleaf https://t.co/3dw5YhMzVT

2014-12-20 23:44:10

bobloch tweeted: @bobloch

What needs to happen to have the nickname "toast" officially transferred from Izel Jenkins to Fletcher? @RealGlenMacnow

2014-12-20 23:41:25

DrMathochist tweeted: @DrMathochist

RT @TheGoodDeath: Good man. Wonderful father. Bad electrician. http://t.co/MeNfBOt9bE

2014-12-20 23:35:19

rmathematicus tweeted: @rmathematicus

“@andrescaicedo: On the same vein: "Peano's unnoticed proof of Borel's theorem" by Besenyei. http://t.co/nixYBkLY9w”

2014-12-20 23:27:02

rmathematicus tweeted: @rmathematicus

“@andrescaicedo: "Amazing oblivion of Peano's contributions to mathematics" by Dolecki and Greco http://t.co/bNIpR4h0Hi”

2014-12-20 23:26:27

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