April 27, 2015

4:51 PM | Entia Nomina V CFP
The “Entia et Nomina” series features English language workshops for young researchers in formally oriented philosophy, in particular in logic, philosophy of science, formal epistemology or philosophy of language. The aim of the workshop is to foster cooperation among young philosophers with a formal bent from various research groups. The fourth workshop in the series was Trends in Logic XIV and took place at Ghent University in 20014. The fifth workshop in the series will take place […]
3:02 PM | The European Society for Analytic Philosophy - new webpage
By Catarina Dutilh NovaesThe European Society for Analytic Philosophy was created in 1990, with the mission to promote collaboration and exchange of ideas among philosophers working within the analytic tradition, in Europe as well as elsewhere. It has thus been responsible for organizing major conferences every 3 years, the highly successful ECAP’s.The current Steering Committee (of which I am a member), under the leadership of current president Stephan Hartmann, is seeking to expand the ways […]

April 26, 2015

11:00 AM | Jim Henle Serves Up Math, Piping Fresh
"The Proof and the Pudding" by Jim Henle Back in February I called Michael Harris's "Mathematics Without Apologies" perhaps the oddest popular mathematics read I'd ever come across... and in a serious, philosophical and psychological way, it was. But now, just a couple months later I come across Jim Henle's short "The Proof and the Pudding," which is also one of the oddest math volumes I've

April 25, 2015

12:00 AM | Peirce’s 1880 “Algebra Of Logic” Chapter 3 • Comment 7.4
Dyadic relations enjoy yet another form of graph-theoretic representation as labeled bipartite graphs or labeled bigraphs.  I’ll just call them bigraphs here, letting the labels be understood in this logical context. The figure below shows the bigraphs of the 16 … Continue reading →

April 24, 2015

3:56 PM | “Statistical Concepts in Their Relation to Reality” by E.S. Pearson
To complete the last post, here’s Pearson’s portion of the “triad”  “Statistical Concepts in Their Relation to Reality” by E.S. PEARSON (1955) SUMMARY: This paper contains a reply to some criticisms made by Sir Ronald Fisher in his recent article on “Scientific Methods and Scientific Induction”. Controversies in the field of mathematical statistics seem largely […]
12:26 PM | Weekly Potpourri
Lest you missed any of these: 1)  Hmmm... following the viral success of the 'Singapore problem' saw lots of folks putting up puzzles this week of various sorts. Will only mention a few: Futility Closet ran 3 humdinger brain twisters last weekend: http://www.futilitycloset.com/2015/04/18/all-relative-4/ and then also posted this lovely "quickie" the next day: http://www.futilitycloset.com/2015/

April 23, 2015

5:57 PM | Jamesian epistemology formalised: an explication of 'The Will to Believe'
Famously, William James held that there are two commandments that govern our epistemic life.There are two ways of looking at our duty in the matter of opinion, --- ways entirely different, and yet ways about whose difference the theory of knowledge seems hitherto to have shown very little concern. We must know the truth; and we must avoid error, --- these are our first and great commandments as would be knowers; but they are not two ways of stating an identical commandment [...] Believe truth! […]
5:30 PM | Peirce’s 1880 “Algebra Of Logic” Chapter 3 • Comment 7.3
Dyadic relations have graph-theoretic representations as directed graphs with loops, also known as pseudo-digraphs in some schools of graph theory.  I’ll just call them digraphs here, letting their loopiness be taken for granted in this logical context. The figure below … Continue reading →

April 22, 2015

4:53 PM | What You May Have Missed
Logic went viral, sad news, good news. All on the new blog site, richardzach.org.  Please update your links and subscriptions.
4:12 AM | NEYMAN: “Note on an Article by Sir Ronald Fisher” (3 uses for power, Fisher’s fiducial argument)
Note on an Article by Sir Ronald Fisher By Jerzy Neyman (1956) Summary (1) FISHER’S allegation that, contrary to some passages in the introduction and on the cover of the book by Wald, this book does not really deal with experimental design is unfounded. In actual fact, the book is permeated with problems of experimentation.  […]

April 21, 2015

4:05 AM | The end of science?
Paperback and electronic versions of John Horgan’s 1996 book, The End of Science, have recently been published by Basic Books. Horgan wrote a bit about how the text was received in 1996 on his weekly Scientific American blog. I read the book in 1996 and wrote to Horgan about the impact it had on me. [...]

April 20, 2015

3:51 PM | Barnaby Sheppard’s The Logic of Infinity — website
I haven’t yet reviewed Barnaby Sheppard’s The Logic of Infinity (CUP 2104) here — and I don’t know if I will, for even if time may be infinite, that allotted to me certainly isn’t! But when I dipped into the book, … Continue reading →
2:30 PM | Brilliant indeed
I was going to post about the delights of Amsterdam as a place to visit for a week — the cityscapes, the cafes, the restaurants, the museums large and small, the whole urban experience, all even better than we hoped. … Continue reading →

April 19, 2015

5:00 PM | Peirce’s 1880 “Algebra Of Logic” Chapter 3 • Comment 7.2
Because it can sometimes be difficult to reconnect abstractions with their concrete instances, especially after the abstract types have become autonomous and taken on a life of their own, let us resort to a simple concrete case and examine the … Continue reading →

April 18, 2015

5:47 PM | Neyman: Distinguishing tests of statistical hypotheses and tests of significance might have been a lapse of someone’s pen
“Tests of Statistical Hypotheses and Their Use in Studies of Natural Phenomena” by Jerzy Neyman ABSTRACT. Contrary to ideas suggested by the title of the conference at which the present paper was presented, the author is not aware of a conceptual difference between a “test of a statistical hypothesis” and a “test of significance” and uses […]

April 17, 2015

11:45 AM | Big Bag of Weekly Links
The math bits I didn't much cover at Math-Frolic this week (and quite a varied selection I must say!)... 1)  Only one topic to start a wrap-up of this week with: that Singapore logic conundrum... Ever-instructive and smiling James Grime covers the possible answers (depending on semantics) in this video: http://singingbanana.tumblr.com/post/116546302907/

April 16, 2015

8:09 AM | Dynamic epistemic logic solves the birthday puzzle
Many of you will have come across the 'birthday puzzle' that went viral this week:Proving that philosophical logicians can make real contributions to serious, societal problems, my colleague Barteld Kooi has made a video where he explains how the puzzle can be solved with the help of dynamic epistemic logic. (Barteld is one of the most prominent researchers working in the field -- in particular, he is one of the authors of Dynamic Epistemic Logic (2008) and one of the editors of the much more […]
7:03 AM | A. Spanos: Jerzy Neyman and his Enduring Legacy
A Statistical Model as a Chance Mechanism Aris Spanos  Today is the birthday of Jerzy Neyman (April 16, 1894 – August 5, 1981). Neyman was a Polish/American statistician[i] who spent most of his professional career at the University of California, Berkeley. Neyman is best known in statistics for his pioneering contributions in framing the Neyman-Pearson (N-P) […]

April 15, 2015

8:23 PM | New Posts: Please Update Links and Subscriptions
Reminder: there is new content on the new blog site, richardzach.org.  Please update your links and subscriptions.

April 14, 2015

1:28 AM | Philosophy of Statistics Comes to the Big Apple! APS 2015 Annual Convention — NYC
Start Spreading the News…..  The Philosophy of Statistics: Bayesianism, Frequentism and the Nature of Inference, 2015 APS Annual Convention Saturday, May 23  2:00 PM- 3:50 PM in Wilder (Marriott Marquis 1535 B’way)     Andrew Gelman Professor of Statistics & Political Science Columbia University Stephen Senn Head of Competence Center for Methodology and Statistics (CCMS) […]

April 13, 2015

9:00 PM | Peirce’s 1880 “Algebra Of Logic” Chapter 3 • Comment 7.1
I wanted to call attention to a very important statement from Selection 7 (CP 3.225–226).  Peirce enumerates the fundamental forms of individual dual relatives in the following terms: 225.   Individual relatives are of one or other of the two forms … Continue reading →

April 12, 2015

10:30 AM | Erica Klarreich... Journalist/Mathematician/Ray Smullyan Fan
Math-Frolic Interview #30 "I specialize in conveying the essence of complex mathematical ideas to non-mathematicians, and giving them a sense of the beauty and depth of mathematics. "At the same time, I also enjoy plunging into topics far from my mathematical roots, and have written about fields such as economics, computer science, medicine, and biology -- often as

April 10, 2015

12:38 PM | Another Veek of Math Links... You're Velcome
Lest you missed them: 1)  A message from an Iowa teacher... that some others can probably relate to: http://shawncornally.com/wordpress/?p=4097 2)  "Solve My Maths" blog wants to 'take back the F-word': http://solvemymaths.com/2015/03/31/taking-back-the-f-word/ 3)  A John Conway puzzle via Futility Closet: http://www.futilitycloset.com/2015/04/08/overheard-4/ 4)  Mathematician Jason
10:37 AM | Aristotle's definition of the syllogism -- a dialogical interpretation
By Catarina Dutilh Novaes(Cross-posted at NewAPPS)(I am currently finishing a paper on the definition of the syllogism according to Aristotle, Ockham, and Buridan. I post below the section where I present a dialogical interpretation of Aristotle's definition.)Aristotle’s definition of ‘syllogismos’ in Prior Analytics (APri) 24b18-22 is among one of the most commented-upon passages of the Aristotelian corpus, by ancient as well as (Arabic and Latin) medieval commentators. He offers very […]

April 09, 2015

6:40 PM | Objective Frameworks • Properties and Instances : 1
Dealing with sign relations that contain many types of signs — icons, indices, symbols, and more complex types — is a task that calls for a flexible and powerful organizational framework, one with the ability to grow and develop over … Continue reading →
3:04 AM | Heads I win, tails you lose? Meehl and many Popperians get this wrong (about severe tests)!
[T]he impressive thing about the 1919 tests of Einstein ‘s theory of gravity] is the risk involved in a prediction of this kind. If observation shows that the predicted effect is definitely absent, then the theory is simply refuted. The theory is incompatible with certain possible results of observation—in fact with results which everybody before […]

April 07, 2015

7:51 PM | Burgess, Rigor and Structure — 3
As we saw, Burgess holds that the very project of rigorization calls for the development of a single unifying foundational system with “a common list of primitives and postulates”; but I suggested that the initial reasons he gives  for this, at least, don’t seem particularly … Continue reading →

April 05, 2015

2:45 AM | Joan Clarke, Turing, I.J. Good, and “that after-dinner comedy hour…”
I finally saw The Imitation Game about Alan Turing and code-breaking at Bletchley Park during WWII. This short clip of Joan Clarke, who was engaged to Turing, includes my late colleague I.J. Good at the end (he’s not second as the clip lists him). Good used to talk a great deal about Bletchley and his […]

April 04, 2015

2:57 PM | Notes on Category Theory v.5
Here is an updated version of my on-going Notes on Category Theory, now 130 pp. long. I have done an amount of revision/clarification of earlier chapters, and added two new chapters — inserting a new Ch. 7 on categories of categories and issues … Continue reading →

April 03, 2015

3:45 PM | Good, Friday Potpourri
Here's part of the week that was, in math: 1)  April is "Mathematics Awareness Month" (I'd say Jan. thru Dec. pretty much qualify too, but whatever): http://www.mathaware.org/index.html https://www.facebook.com/pages/Mathematics-Awareness-Month/160088737380286 2)  A new "Math Teachers At Play" blog carnival brought to us beautifully by John Golden: http://mathhombre.blogspot.com/2015/03/
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