X

+

5:28 PM | Problems of a problematic vocation

Readers who (like the author) persist in wondering what I was trying to say after they have finished the book may find it useful to take the book’s subtitle more literally. If you believe mathematics is a problematic vocation, it doesn’t necessarily follow that you believe that the problems have solution, much less that the […]

+

4:00 AM | Survey of Relation Theory • 2

In this Survey of previous blog and wiki posts on Relation Theory, relations are viewed from the perspective of combinatorics, in other words, as a topic in discrete mathematics, with special attention to finite structures and concrete set-theoretic constructions, many … Continue reading →

+

1:38 PM | Plato, graphs, vision and another anchor

I’m not sure what led me to David Mumford’s Why I am a Platonist, which appeared in a 2008 issue of the European Mathematical Society (EMS) Newsletter, but I’m happy I found it. David Mumford is currently Professor Emeritus at Brown and Harvard Universities. The EMS piece is a clear and straightforward exposition of [...]

+

12:00 PM | The Year In Books

(via WikiMediaCommons)
Reviewing another great year in popular math! Your mileage may vary....
Which is always my
way of warning that my picks for favorite reads of the year won't necessarily suit
your own interests/tastes. With that said...
Will start with a few miscellaneous notes:
a) If you enjoy Tyler
Vigen's humorous "Spurious Correlations" website (a sort of parody of statistical

+

Some recent criticisms of statistical tests of significance have breathed brand new life into some very old howlers, many of which have been discussed on this blog. One variant that returns to the scene every decade I think (for 50+ years?), takes a “disagreement on numbers” to show a problem with significance tests even from a “frequentist” perspective. Since it’s […]

+

1:00 PM | This Week's Leftovers...

Thankful for another week of mathy stuff...1) For the advanced amongst you, Peter Woit posts about Langlands news:http://www.math.columbia.edu/~woit/wordpress/?p=81042) Arthur Benjamin interviewed (podcast, 30-mins.) about his book, "The Magic of Math":http://www.scientificamerican.com/podcast/episode/math-can-equal-fun/3) Once again sweet, amiable Doron Zeilberger considers possibly telling

+

8:58 PM | Book Note: Tony Roy, Symbolic Logic, #1

Tony Roy (Philosophy, California State University, San Bernardino) has generously made available his Symbolic Logic: An Accessible Introduction to Serious Mathematical Logic. I’m commenting here on the version of October 6, 2015. The full main text is no less than 746 pages … Continue reading →

+

2:18 PM | 3 YEARS AGO (NOVEMBER 2012): MEMORY LANE

MONTHLY MEMORY LANE: 3 years ago: November 2012. I mark in red three posts that seem most apt for general background on key issues in this blog.[1]. Please check out others that didn’t make the “bright red cut”. If you’re interested in the Likelihood Principle, check “Blogging Birnbaum” and “Likelihood Links”. If you think P-values are hard to explain, see how […]

+

As I’ve noted, it is time to update the much-downloaded Teach Yourself Logic Study Guide for 2016, and I’ve recently made a start working through the current version. So far, the editorial tinkering has been plentiful but minor as far as content is … Continue reading →

+

12:54 PM | A moment of cheer

For ever and a day, the old have bemoaned the state of the world and how it is now all going to the dogs. But it is difficult not to feel that, yes, even here in Europe, things really are … Continue reading →

+

The first draft of the chapter of MWA entitled Further investigations of the mind-body problem was written in a hurry in the summer of 2010, and for that reason can claim to be the first extended contribution to the metaphysical study of Ed Frenkel’s buttocks, as a contribution to mathematical culture. By now, though, enough […]

+

All members of the editorial board of a mathematical journal that will remain unnamed received the above diagram, accompanied by a message by the author that included the lines “It seems that understanding of these things is difficult for you.” The last line above is also worth pondering.

+

11:00 AM | A Life In Math

"What a wee little bit of a person's life are his acts and his words!
His real life is led in his head, and is known to none but himself...
Biographies are but the clothes and buttons of the man. The biography of
the man himself cannot be written."
-- Mark Twain quoted in "A Numerate Life" by John Allen Paulos
A blurb today on John Allen Paulos' latest book (released in paperback), which

+

Today is Erich Lehmann’s birthday (20 November 1917 – 12 September 2009). Lehmann was Neyman’s first student at Berkeley (Ph.D 1942), and his framing of Neyman-Pearson (NP) methods has had an enormous influence on the way we typically view them. I got to know Erich in 1997, shortly after publication of EGEK (1996).One day, I received a […]

+

1:15 PM | Math Potpourri

For your weekend reading/listening:
1) This Reddit
thread mentions several math podcasts (several of which I include in my
list on right-side of this page), and also pointed me to the Quanta Science podcast that I was unaware of:
https://www.reddit.com/r/math/comments/3r1ox2/are_there_any_good_math_podcasts_out_there/2) A blurb from Mathbabe this week (linking in turn to THIS Nature article)

+

4:31 PM | Dirty Hands, part 1: Forbidden fruits

The graph illustrates what happened to MWA‘s Amazon sales rank after Jim Holt’s review came out in the New York Review of Books. Last March, after I quoted Tom Waits in order to express my ambivalence toward Amazon (on the one hand, it has been a disaster for independent bookstores; on the other hand, it […]

+

4:33 PM | Women in French mathematics: statistics

The statistics speak for themselves. The situation is much worse than I thought. More statistics can be found at the Femmes et Mathématiques website.

+

I would be inclined to write more about Jim Holt’s very generous review of MWA in the December 3 issue of the New York Review of Books but I’m still feeling rather disoriented, I think understandably, by the weekend’s events in Paris. You can get a sense of the atmosphere from this news item in […]

+

1:08 PM | “…an anchor in the cosmic swirl.”

Looking through some blog sites that I once frequented (but have recently neglected) I saw that John Horgan’s Cross Check had a piece on George Johnson’s book Fire in the Mind: Science, Faith, and the Search for Order. This quickly caught my attention because Horgan and Johnson figured prominently in my mind in the late [...]

+

No summary available for this post.

+

4:49 AM | Lessons of the Paris attacks

I strongly believe in statistical explanation, although it makes me philosophically uneasy. It’s not that I can’t reconcile it with my no less strong belief in the principle of cause and effect; philosophers of various persuasions have taught me different ways to adjust the relative strength of these two beliefs as a function of circumstances. […]

+

There’s an important guest editorial by Keith Baggerly and C.K. Gunsalus in today’s issue of the Cancer Letter: “Penalty Too Light” on the Duke U. (Potti/Nevins) cancer trial fraud. Here are some excerpts. publication date: Nov 13, 2015 Penalty Too Light What does it say about our national commitment to research integrity that the Department of […]

+

1:50 PM | Friday Math Wrap-up

Math from the week...1) Evelyn Lamb covered the topologist winner of the Breakthrough Prize award this week:
http://tinyurl.com/q4cpbwb
...and long, interesting Michael Harris post on the Breakthrough Prizes here:https://mathematicswithoutapologies.wordpress.com/2015/11/09/working-the-red-carpet-part-2/2) From fivethirtyeight blog a cautionary tale on scientific method:http://

+

11:36 PM | Postcard from Vienna

A week in Vienna, staying in the Innere Stadt where The Daughter is living for three months. Some unreasonably good weather, warm enough to take coffee sitting outside. The city looking wonderful in the bright sun. And then in a different … Continue reading →

+

Findings of Research Misconduct A Notice by the Health and Human Services Dept on 11/09/2015 AGENCY: Office of the Secretary, HHS. ACTION: Notice. ----------------------------------------------------------------------- SUMMARY: Notice is hereby given that the Office of Research Integrity (ORI) has taken final action in the following case: Anil Potti, M.D., Duke University School of Medicine: Based on the […]

+

2:17 AM | Working the red carpet, part 2

That’s the Press Badge I wore while covering last year’s Breakthrough Prize ceremony. For readers of this blog, the big news from Mountain View this year is, of course, Peter Scholze’s refusal of the $100,000 New Horizons Prize. That comes as a bit of a surprise to me, I have to admit; I was one […]

+

It was getting late and I neglected to mention the important detail that Lily Collins (daughter of Phil, that should also be mentioned) starred in a film called Abduction (with an embarrassing IMDB rating of 5/10) opposite C. S. Pierce (pictured above). And something tells me (just this morning) that this year’s ceremony will be […]

+

3:19 AM | Working the red carpet, part 1

Tomorrow the annual Breakthrough Prize ceremony, created by venture capitalist Yuri Milner in 2012, with the help of a group of Silicon Valley luminaries, will include mathematicians for the second time. I was on hand last year, at the cavernous Hangar One in Mountain View, wearing a press badge, and that’s why I was on […]

+

6:25 AM | “Ideas are the currency of mathematics.”

That sentence, spoken by Dick Gross this past Tuesday, is a particularly effective epigrammatic expression of the value system that prevails in our corner of mathematics. It also fits neatly with the ontological commitment expressed in a sentence from my Princeton Companion to Mathematics article: “if you can steal ideas, then they are real” — […]

+

2:00 PM | That Was the Math Week That Was

So much math, so little time....
1) Jordan Ellenberg with another of those viral-type math
probability problems (which he relates back to the 'hot-hand'
controversy):http://tinyurl.com/psexlp82) And another problem, this time geometric, making some waves:
http://tinyurl.com/naqhkts
...and still some more monthly puzzles here:http://teachfurthermaths.weebly.com/puzzle-of-the-month
3)

Sidebar

Filters

+

di diffusione della scienza e rivoluzioni cc @aubreymcfato @CristianCantoro Utilizzare i dati sulle citazioni in Wikipedia per misurare la diffusione dell'open accessScrivevo all'inizio del 2011 per i festeggiamenti del wiki-decennale di una rivoluzione irreversibile. E' stato piuttosto interessante leggere il titolo che technology review ha utilizzato per raccontare dell'ultimo degli articoli dedicati all'enciclopedia libera: Why Wikipedia + Open Access = Revolution.L'idea degli autori, Misha
[…]

Nielsen, F. (2007). Scientific citations in Wikipedia, First Monday, 12 (8) DOI: 10.5210/fm.v12i8.1997

Heather Ford, Shilad Sen, David R. Musicant & Nathaniel Miller (2013). Getting to the source: where does Wikipedia get its information from?, Proceedings of the 9th International Symposium on Open Collaboration, DOI: 10.1145/2491055.2491064

Misha Teplitskiy, Grace Lu & Eamon Duede (2015). Amplifying the Impact of Open Access: Wikipedia and the Diffusion of Science, Wikipedia Workshop at 9th International Conference on Web and Social Media (ICWSM), arXiv: 1506.07608v1

Citation

+

After (or before?) @StartsWithABang's balloon animals' post? A couple of week ago Ethan Siegel published a post about ballon animals, so I decide to repost an old piece that I wrote in 2011 for my italian blog: the english version is lost, but it is magically reposted here! Two one-balloon constructions and their associated graphsI recently discovered this interesting site, vihart. In the site there are some interesting paper and today I want to write something about Computational Balloon
[…]

Demaine E.D., Demaine M.L. & Hart V. (2008). Computational balloon twisting: The theory of balloon polyhedra., Proceedings of the 20th Canadian Conference on Computational Geometry (CCCG2008), 139-142.

Bryś K. & Lonc Z. (2009). Polynomial cases of graph decomposition: A complete solution of Holyer's problem, Discrete Mathematics, 309 (6) 1294-1326. DOI: 10.1016/j.disc.2008.01.054

Citation

+

Supponiamo di doverci confrontare con un animale, ad esempio un cane o un lupo (o più in generale con un animale, addomesticato o selvaggio). Secondo Konrad Lorenz il comportamento aggressivo di un cane viene influenzato da due stati d'animo differenti: l'ira e la paura.Si può allora provare a prevedere il comportamento del cane in funzione di quale dei due stati domina: nel caso in cui l'animale è dominato da paura o da ira, proporre una previsione è abbastanza semplice; nel caso in cui il […]

Zeeman E.C. (1976). Catastrophe Theory, Scientific American, 234 65-83. DOI: 10.1038/scientificamerican0476-65

Jean Petitot (2013). Complexity and self-organization in Turing, The Legacy of A.M. Turing, (E. Agazzi, ed.), Franco Angeli, Milano, 149-182. arXiv: 1502.05328v1

Citation

+

Non prevedevo di scrivere la versione italiana di un post sull'ultima news proveniente dal RHIC, ma mi è stato gentilmente chiesto, e provvedo ben volentieri. Inizio, però, con un piccolo cappello, alla fine del quale saprete che c'è anche un piccolissimo pezzetto (il doppio diminutivo è perché i firmatari del papero su arXiv sono veramente tanti) d'Italia in questa interessante scoperta.Tutto nasce da un post, nel flusso twittero, di Annalisa Arci, in cui racconta, in maniera e con un […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv, arXiv: 1504.02175v2

Citation

+

A new clue about the #quarkgluonplasma from @RHIC_STAR at @BrookhavenLabWithin the particles that constitute atomic nuclei, protons and neutrons, there are the quarks, the elementary particles with fractional charges, linked to each other thanks to the gluons, bosons that carry the nuclear interaction. Thanks to the gluons it is impossible to observe, at present, free quarks, but it is expected that in the very first stage of the universe, matter was in a state called quark-gluon plasma. Thanks […]

Belavina A.A., Polyakova A.M., Schwartza A.S. & Tyupkina Y.S. (1975). Pseudoparticle solutions of the Yang-Mills equations, Physics Letters B, 59 (1) 85-87. DOI: 10.1016/0370-2693(75)90163-X

Hooft G.'. (1976). Symmetry Breaking through Bell-Jackiw Anomalies, Physical Review Letters, 37 (8) DOI: 10.1103/PhysRevLett.37.8

Hooft G.'. (1976). Computation of the quantum effects due to a four-dimensional pseudoparticle, Physical Review D, 14 DOI: 10.1103/PhysRevD.14.3432

Fukushima K., Kharzeev D.E. & Warringa H.J. (2008). The Chiral Magnetic Effect, Physics Review D, 78 (7) DOI: 10.1103/PhysRevD.78.074033

Kharzeev D.E. & Yee H.U. (2011). Chiral Magnetic Wave, Physical Review D, 83 DOI: 10.1103/PhysRevD.83.085007

STAR Collaboration (2015). Observation of charge asymmetry dependence of pion elliptic flow and the possible chiral magnetic wave in heavy-ion collisions, arXiv: 1504.02175v2

Citation

CardColm tweeted: @CardColm

Donate to Gathering 4 Gardner https://t.co/trGkU9pX4c especially if you were influenced by Martin Gardner https://t.co/bVC7AjYOGn

2015-12-02 04:56:48

frankmcgowa tweeted: @frankmcgowa

2015-12-02 04:43:15

DrMathochist tweeted: @DrMathochist

RT @vogon: I agree with it entirely but this subhed makes me imagine an office with a billion internal walls and it's hilarious https://t.c…

2015-12-02 04:40:59

mathhombre tweeted: @mathhombre

2015-12-02 04:38:38

MindAfterMath tweeted: @MindAfterMath

2015-12-02 04:34:36

mathhombre tweeted: @mathhombre

2015-12-02 04:31:20

frankmcgowa tweeted: @frankmcgowa

Plate tectonics in the middle school. Have you / are you including convection? It seems like this is in the HS band now. Thoughts? #NGSS

2015-12-02 04:30:07

loronegro tweeted: @loronegro

Soy famoso. El doodle de Google consiste en unos pastelitos de cumpleaños.

2015-12-02 04:00:45

X