X

+

3:11 PM | Poetry of Romania - Nora School, Apr 24

During several summers teaching conversational English to middle-school students in Deva, Romania, I became acquainted with the work of Romanian poets. These included: Mikhail Eminescu (1850-1889, a Romantic poet, much loved and esteemed, honored with a portrait on Romanian currency), George Bakovia (1881-1957, a Symbolist poet, and a favorite poet of Doru Radu, an English teacher in Deva with whom I worked on some translations of Bacovia into English),
[…]

+

2:38 AM | Humor at #NCTMNOLA

Last Wednesday evening, Steven Strogatz delivered the opening session at the 2014 NCTM Annual Meeting in New Orleans. His talk shared a title with his bestselling book, The Joy of x. During the talk, he described five keys in bringing math to the masses, including what worked — and what didn’t — when he wrote a 15-part series […]

+

12:16 AM | Improving a Math Game

It was 7:02 a.m. on a Saturday morning. Alex ran into my bedroom and woke me from an incredible dream — I was speaking to Riemann, Newton, Pascal, and several other dead mathematicians, and they were just about to reveal an odd perfect number. “Deedy!” he yelled — somehow daddy has been transformed to deedy in my house — […]

+

11:19 PM | Dimensions of a soul

In the poem below, Young Smith uses carefully precise terms of Euclidean geometry to create a vivid interior portrait. She Considers the Dimensions of Her Soul by Young Smith The shape of her soul is a square. She knows this to be the case because she often feels its corners pressing sharp against the bone just under her shoulder
[…]

+

12:00 AM | One-Second Day

One-Second Day
What would happen if the Earth's rotation were sped up until a day only lasted one second?
—Dylan
If this is going to happen, I hope it doesn't happen late in the afternoon next Friday.
The Earth rotates,[citation needed] which means its midsection is being flung outward by centrifugal force.[1]Which is still a real thing. This centrifugal force isn't strong enough to overcome gravity and tear the Earth apart, but it's enough to flatten the Earth slightly
[…]

+

10:15 PM | Breaking Boxes

I order a lot of stuff online. In the past week I’ve ordered socks, postage stamps, 4 small glockenspiels and a new hammock for the office, among other things. This means boxes, lots of boxes. I’ve got a process for breaking them down that is easy and doesn’t add strain to my hands after a […]

+

1:24 AM | A Vector Space Poem

As a Columbia undergraduate, media artist Millie Niss (1973-2009) majored in mathematics and was enrolled in a math PhD program at Brown University when she decided to make writing her full-time career. Before her untimely death in 2009 Niss was well-established in Electronic Literature. Here is a link to "Morningside Vector Space," one of the poems at Niss's website Sporkworld (at Sporkworld, click on the the E-poetry link).
[…]

+

3:07 AM | Fractal Geometry

Lee Felice Pinkas is one of the founding editors of cellpoems -- a poetry journal distributed via text message. I found her poem,"The Fractal Geometry of Nature" in the Winter/Spring 2009 Issue (vol.14, no 1) of Crab Orchard Review.The Fractal Geometry of Nature by Lee Felice Pinkas Most emphatically, I do not
[…]

+

8:30 PM | Math Symbols Crashing

To most of us, it’s just the at symbol. But to the Dutch, its an apestaart, or “monkey’s tail.” That’s a much cooler name, and it’s the one I’ll be using from now on. (Apparently apeklootje is another alternative, but since “little monkey’s testicles” isn’t appropriate in all situations, I’ll stick with apestaart.) A lot […]

+

2:08 PM | ΜΙΑ ΠΡΟΤΑΣΗ ΣΕ ΤΡΕΙΣ ΠΡΑΞΕΙΣ

<!--[if gte mso 9]>
<![endif]-->
<!--[if gte mso 9]>
Normal
0
false
false
false
EN-US
JA
X-NONE
<![endif]--><!--[if gte mso 9]>

+

12:00 AM | Faucet Power

Faucet Power
I just moved into a new apartment. It includes hot water but I have to pay the electric bill. So being a person on a budget ... what's the best way to use my free faucet to generate electricity?
David Axel Kurtz
You could build a tiny hydroelectric dam in your tub.
It would generate power, though not very much of it. The formula for power is pressure times flow rate.[1]Or, alternately, flow rate times density times height. Since bathtubs are pretty shallow, the pressure
[…]

+

4:50 PM | April Celebrates Poetry and Mathematics

On April 1 (the first day of National Poetry Month and Mathematics Awareness Month) Science writer Stephen Ornes offered a guest post at The Last Word on Nothing entitled "Can an Equation be a Poem?" and on April 2 the Ornes posting appeared again, this time in the blog Future Tense at Slate.com with the title "April Should Be Mathematical Poetry Month." In her comment on "Can an Equation be a Poem?" Scientific American blogger Evelyn Lamb (Roots of Unity)
[…]

+

No summary available for this post.

+

4:16 PM | Logic in limericks

In these lines, Sandra DeLozier Coleman (who participated in the math-poetry reading at the Joint Mathematics Meetings in Baltimore in January) speaks as a professor reasoning in rhyme, explaining truth-value technicalities of the logical implication, "If p then q" (or, in notation, p -- > q ). The Implications of Logic by Sandra DeLozier Coleman That p --> q is true, Doesn’t say very much
[…]

+

5:38 PM | Tu y tus antepasados ¿cuántos sois?

j Ahí donde te ves, tienes 2 padres, 4 abuelos, 8 bisabuelos y la cosa sube en progresión geométrica. Muy pronto se alcanzan cifras imposibles, si no fuera porque los antepasados se repiten, cada uno puede ser tatatarabuelo de muchos. Un … Sigue leyendo →

+

4:19 AM | Lost Memories: Interactive Art Code

Today I was reminded of a piece of “interactive art code” I’d created a couple years ago as a proof-of-concept of what could be done with Khan Academy’s CS platform. The code and compiled result are shown side by side, so you can edit while seeing the result in real time. Editing is easy: click […]

Editor's Pick

+

12:00 AM | Great Tree, Great Axe

Great Tree, Great Axe
If all the seas were one sea,What a great sea that would be!If all the trees were one tree,What a great tree that would be!If all the men were one man,What a great man that would be!If all the axes were one axe,What a great axe that would be!And if the great man took the great axe,And cut down the great tree,And let if fall into the great sea,What a great splish-splash that would be!
... How great would all of these things be?
—John Eifert (quoting a Mother Goose
[…]

+

7:00 PM | Todo, todo, todo Sierpinski

Todo sobre el triángulo de Sierpinski en la página definitiva sobre triángulos de Sierpinkski. Triángulos, fractales, combinatoria, Pascal, matrices, dibujos, programación, curvas, animaciones, interactivo, colores, 3D, todo amplio, detallado, vistoso y bello, para conocer, disfrutar y aprender muchas mates. Vía microsiervos.

+

4:39 AM | Can you SEE the monument?

Links to non-intersecting celebrations of April as National Poetry Month and Mathematics Awareness Monthare available here and here.Recently I revisited my copy of Elizabeth Bishop: The Compete Poems, 1927-1979 (FSG, 1999) and turned to "The Monument" -- a poem mathematically interesting for its geometry. Here are the opening lines; the complete text and many other Bishop poems are available online here:from The Monument […]

+

4:34 AM | March, 2014 -- dates, titles of posts

Scroll down to find titles and dates of posts in 2014. At the bottom is a links to lists of posts through 2013 and 2012 and 2011 -- and all the way back to March 2010 when this blog was begun. This link leads to a PDF file that lists searchable topics and names of poets and mathematicians presented herein.Mar 30 Split This Rock 2014 was great!Mar 27 Women's History -- celebrate Caroline HerschelMar 23 Homage to EuclidMar 20 One geometry is not
[…]

+

9:24 PM | Split This Rock 2014 was great!

Split This Rock calls poets to a greater role in public life and fosters a national network of socially engaged poets. Split this Rock's biannual 4-day poetry festival ended today and the air in Washington, DC is electric with the passion of engagement -- minds and bodies energized by fine poems that demand opportunity and justice for all. I was glad to be there, participating in workshops and readings led by today's finest poetic voices. Poets featured in the
[…]

+

Το άρθρο της εισήγησής μου, από τα Πρακτικά του Συνεδρίου "6η Μαθηματική Εβδομάδα", που διοργανώθηκε από το Παράρτημα Κεντρικής Μακεδονίας της ΕΜΕ, όπως και κάθε χρόνο εδώ και έξι χρόνια, μπορείτε να το διαβάσετε εδώ

+

From concert at Merkin Hall, February 9, 2014. Inga Kashakashvili, piano. Jay Campbell, cello. georgeoakleycomposition.com

+

8:00 PM | Transferencia de calor

Entre las estufas eléctricas siempre he sido partidario de las estufas de convección, porque al mover el aire calientan más y mejor con menos dinero, pero nunca había visto esquemas tan claros de los tipos de trasmisión de calor como … Sigue leyendo →

+

5:25 PM | Fuente Sigil

Una imaginativa tipografía que sugiere nodos, conexiones y redes, obra de Rei Kirie.

+

11:21 AM | Math Pranks

Jeff Gordon recently pulled a prank on a blogger who claimed that one of Gordon’s previous pranks was fake. The video received 10 million views in its first two days, so it’s doubtful you haven’t seen it… but just in case (warning: PG-13)… Now that’s a pretty good prank. Especially since it involves revenge. But my […]

+

8:00 PM | Fórmula del binomio de Newton

Ya es habitual representar gráficamente la fórmula del cuadrado de una suma (a+b)²=a²+2ab+b² y el autor de do-math da un paso más y nos dibuja la fórmula del binomio de Newton de grado 3. ¿Quien se atreve con la de 4º … Sigue leyendo →

+

In the sixties when I spent a year at Bucknell University, I was a member of the "Department of Astronomy and Mathematics," a pairing of related disciplines. In past centuries, Mathematics was included one of the liberal arts. In the twenty-first century it often is paired with Computer Science, and Astronomy is paired with Physics. And so it goes. Poems by Laura Long tell of the pioneering work by
[…]

Sidebar

Filters

+

Non voglio fare concorrenza alla splendida spiegazione di Amedeo o a quella tecnica di Corrado, ma mia sorella, leggendo il post di pancia scritto nella sera dell'annuncio di BICEP2, ha candidamente confessato di non aver capito cosa era accaduto quel giorno. E allora proviamoci, a raccontarlo. (da The Cartoon History of the Universe #1 di Larry Gonick)C'era una volta un'idea di universo, che era la Terra al centro, quindi il Sole, la Luna e gli altri pianeti e sullo sfondo le stelle fisse,
[…]

Hubble E. (1929). A relation between distance and radial velocity among extra-galactic nebulae, Proceedings of the National Academy of Sciences, 15 (3) 168-173. DOI: 10.1073/pnas.15.3.168

Gamow G. (1948). The Evolution of the Universe, Nature, 162 (4122) 680-682. DOI: 10.1038/162680a0

Alpher R.A. & Herman R. (1948). Evolution of the Universe, Nature, 162 (4124) 774-775. DOI: 10.1038/162774b0

Alpher R., Bethe H. & Gamow G. (1948). The Origin of Chemical Elements, Physical Review, 73 (7) 803-804. DOI: 10.1103/PhysRev.73.803

Peebles P.J.E., Schramm D.N., Turner E.L. & Kron R.G. (1994). The Evolution of the Universe, Scientific American, 271 (4) 52-57. DOI: 10.1038/scientificamerican1094-52

McLeish T.C.B., Bower R.G., Tanner B.K., Smithson H.E., Panti C., Lewis N. & Gasper G.E.M. (2014). History: A medieval multiverse, Nature, 507 (7491) 161-163. DOI: 10.1038/507161a

Citation

+

Much of my undergrad was spent studying physics, and although I still think that a physics background is great for a theorists in any field, there are some downsides. For example, I used to make jokes like: “soft isn’t the opposite of hard sciences, easy is.” Thankfully, over the years I have started to slowly […]

Lazer, D., Kennedy, R., King, G. & Vespignani, A. (2014). Big data. The parable of Google Flu: traps in big data analysis., Science, 343 (6176) 1203-1205. PMID: 24626916

Citation

+

Un triangolo aureo è un triangolo isoscele in cui il rapporto tra uno dei lati uguali con la base è pari alla sezione aurea $\varphi$. Utilizzando un triangolo aureo di lato 1, è possibile dimostrare che \[1 + \frac{1}{\varphi^2} + \frac{1}{\varphi^4} + \cdots = \varphi\] \[\frac{1}{\varphi} + \frac{1}{\varphi^3} + \cdots = 1\] \[\frac{1}{\varphi} + \frac{1}{\varphi^2} + \frac{1}{\varphi^3} + \cdots = \varphi\] Il triangolo aureo qui sopra è lo screenshot della applet realizzata da Irina
[…]

Edwards S. (2014). Proof Without Words: An Infinite Series Using Golden Triangles, The College Mathematics Journal, 45 (2) 120-120. DOI: 10.4169/college.math.j.45.2.120

Citation

+

Un triangolo aureo è un triangolo isoscele in cui il rapporto tra uno dei lati uguali con la base è pari alla sezione aurea $\varphi$. Utilizzando un triangolo aureo di lato 1, è possibile dimostrare che \[1 + \frac{1}{\varphi^2} + \frac{1}{\varphi^4} + \cdots = \varphi\] \[\frac{1}{\varphi} + \frac{1}{\varphi^3} + \cdots = \1] \[\frac{1}{\varphi} + \frac{1}{\varphi^2} + \frac{1}{\varphi^3} + \cdots = \varphi\] Il triangolo aureo qui sopra è lo screenshot della applet realizzata da Irina […]

Edwards S. (2014). Proof Without Words: An Infinite Series Using Golden Triangles, The College Mathematics Journal, 45 (2) 120-120. DOI: 10.4169/college.math.j.45.2.120

Citation

+

In 1936, Alonzo Church, Alan Turing, and Emil Post each published independent papers on the Entscheidungsproblem and introducing the lambda calculus, Turing machines, and Post-Turing machines as mathematical models of computation. A myriad of other models followed, many of them taking seemingly unrelated approaches to the computable: algebraic, combinatorial, linguistic, logical, mechanistic, etc. Of course, […]

Dershowitz, N. & Gurevich, Y. (2008). A natural axiomatization of computability and proof of Church's Thesis, Bulletin of Symbolic Logic, 14 (3) 299-350. DOI: 10.2178/bsl/1231081370

Citation

Here is what I get when I analyze Peirce’s “giver of a horse to a lover of a woman” example along the same lines as the dyadic compositions. We may begin with the mark-up shown in Figure 19. (19) If we … Continue reading →

2014-04-18 22:00:35

[...]

2014-04-18 20:01:53

[...]

2014-04-18 14:13:52

BIRTHDAY CHALLENGE: Pick a line drawing of the Map of Nigeria (like the one below) with the borders of its states included and try to color each state with one […]

2014-04-18 13:25:43

My complete interview with Steven Strogatz in the February 2014 issue of Math Horizons is now freely available. Math Horizons makes one article from each issue freely available online, and I’m thrilled that for the February 2014 issue they chose my piece. Professor Strogatz is an acclaimed mathematician, writer, and teacher, and I think this interview captures a small […]

2014-04-18 13:00:34

gaussianos tweeted: @gaussianos

IMO 2013 en Santa Marta (Colombia) - Problema nº 4 - #AntologíaGaussiana http://t.co/6CStUANIVR

2014-04-18 12:02:03

profkeithdevlin tweeted: @profkeithdevlin

Snowden Calls BS On Putin's Answer: Says He Was Playing The Role Of Ron Wyden http://t.co/fglozmOaFn

2014-04-18 11:55:34

profkeithdevlin tweeted: @profkeithdevlin

Wuzzit Trouble was named the most important educational game of 2013 by Develop-Online. http://t.co/9elMJzc5sp

2014-04-18 11:51:55

X