In the past I’ve categorized Hipmunk as a really cool flight-finder that doesn’t actually work, as worse than Expedia, and as graphics without content. So, I thought it would be only fair to tell you that I bought a flight the otherShow More Summary
I received the following email: Dear Colleague, Recently we informed you about SciRev, our new website where researchers can share their experiences with the peer review process and select an efficient journal for submitting their work. Show More Summary
Summarizes the paper of Kelly and Street "Review of the elements of 2-categories" containing common background material for papers in the Sydney Category Seminar Lecture Notes 420
I was going to post yet one more discussion of our discussion of the discussion of the discussion of some paper that I don’t really care about, but then I was like, aaaahh, what’s the point? So instead here’s a pointer to the first paper I ever published. Show More Summary
Guest post by Nick Gurski.
My work macbook pro recently crapped out on me during an update of the OS (apparently something has a tendency to go wrong with the video card or its driver or something similar during this particular update for this particular model … sigh) so I’ve had the joy of reinstalling my personal ecosystem of software […]
I’ll reorder this week’s posts a bit in order to continue on a topic that came up yesterday. A couple days ago a reporter wrote to me asking what I thought of this paper on Money, Status, and the Ovulatory Cycle. I responded: Given the...Show More Summary
We have seen the n?1 primality prover in one previous exercise and the n+1 primality prover in another previous exercise. In today’s exercise we combine the two tests. There are two versions, one using a factoring bound and one without. The basic idea of both provers is to express n ? 1 = f1 […]
As in the previous post, all computations here are at the formal level only. In the previous blog post, the Euler equations for inviscid incompressible fluid flow were interpreted in a Lagrangian fashion, and then Noether’s theorem invoked to derive the known conservation laws for this equation. In a bit more detail: starting with Lagrangian […]
I had a brief email exchange with Jeff Leek regarding our recent discussions of replication, criticism, and the self-correcting process of science. Jeff writes: (1) I can see the problem with serious, evidence-based criticisms not being published in the same journal (and linked to) studies that are shown to be incorrect. Show More Summary
Last month a history professor sent me a note regarding plagiarism at Arizona State University: Matthew Whitaker, who had received an expedited promotion to full professor and was made Director of a new Center for the Study of Race and...Show More Summary
In algebraic geometry, we like to make statements like: “two conics meet at points”, “a degree four plane curve has bitangents”, “given four lines in three space, there are lines that meet all of them”. In each of these, we are saying that, as some parameter (the conics, the degree four curve, the lines) changes, […]
I'm giving two talks at Haverford College just before SDM 2014 in Philadelphia. If you're in the area. stop by and say hello !
Thomas Basbøll pointed me to a discussion on the orgtheory blog in which Jerry Davis, the editor of a journal of business management argued that it is difficult for academic researchers to communicate with the public because “the public...Show More Summary
In today’s exercise you are challenged to write a program in a language you’ve never used before. We’ve done this before, and it’s fun; the idea is to get you out of your comfort zone, so you’re thinking about programming, not just blindly following habit. Your task is to write a program in a language […]
We were talking about parallelizing MCMC and I came up with what I thought was a neat idea for parallelizing MCMC (sample with fractional prior, average samples on a per-draw basis). But then I realized this approach could get the right posterior mean or right posterior variance, but not both. Show More Summary
I post (approximately) once a day and don’t plan to change that. I have enough material to post more often—for example, I could intersperse existing blog posts with summaries of my published papers or of other work that I like; and,Show More Summary
Mon: What is the appropriate time scale for blogging—the day or the week? Tues: Literal vs. rhetorical Wed: Plagiarism, Arizona style Thurs: How much time (if any) should we spend criticizing research that’s fraudulent, crappy, or just...Show More Summary
Throughout this post, we will work only at the formal level of analysis, ignoring issues of convergence of integrals, justifying differentiation under the integral sign, and so forth. (Rigorous justification of the conservation laws and other identities arising from the formal manipulations below can usually be established in an a posteriori fashion once the identities […]
Article for the LMS Newsletter on an ethical decision facing mathematicians.