LaTeX trick: rising diagonal dots

Just in case you ever need it: \ddots going the other direction: \makeatletter\def\Ddots{\mathinner{\mkern1mu\raise\p@ \vbox{\kern7\p@\hbox{.}}\mkern2mu \raise4\p@\hbox{.}\mkern2mu\raise7\p@\hbox{.}\mkern1mu}}\makeatother Then you can say: \varepsilon_0= \omega^{\omega^{\Ddots}}


For some reason I missed the memo that said that Kenny Easwaran's blog moved from to his Berkeley webspace.

Modality Morning

This morning has two talks on modal logic: first up was Marcus Kracht with a survey on the development of modal logic; now Steve Awodey is reporting on joint work with Kishida on topological semantics of first-order modal logic. Marcus talked about some interesting results in the mathematics of modal logic, especially general semantics for … Continue reading Modality Morning

Why the Faculty Scholarly Productivity Index doesn’t mean anything in philosophy

Ok. Brit posted about it. Apparently some people claim that the Faculty Scholarly Productivity Index (FSP) shows something about the rankings produced by the Philosophical Gourmet Report (PGR) (e.g., that they're off). But it doesn't. That is not because the PGR is actually the best possible way to measure program or even faculty quality. It … Continue reading Why the Faculty Scholarly Productivity Index doesn’t mean anything in philosophy

Kurt Gödel in the Stanford Encyclopedia

Juliette Kennedy's entry on Kurt Gödel has just been published in in the Stanford Encyclopedia.(It took a long time to get this done because of all the formulas that needed to be converted into HTML. If you find a mistake, please let Juliette or me know.)

Philosophy Genealogy

I just noticed that Josh Dever's Philosophy Family Tree now comes with a little Java applet that gives you a list of your philosophical ancestors (easier to use than the PDF list).Josh, any plans to make the tree capable of dealing with more than one advisor?

A complete first-order temporal logic of time with gaps


Theoretical Computer Science 160 (1996) 241-270
(with Matthias Baaz and Alexander Leitsch)


The first-order temporal logics with □ and ○ of time structures isomorphic to omega (discrete linear time) and trees of omega-segments (linear time with branching gaps) and some of its fragments are compared: The first is not recursively axiomatizable. For the second, a cut-free complete sequent calculus is given, and from this, a resolution system is derived by the method of Maslov.

Help Studia Logica get into ISI

Studia Logica is a very good journal, and it should be indexed in ISI. Help us by recommending it! Go hereComplete the form using the following data:Journal title: Studia LogicaJournal URL: www.StudiaLogica.orgPublisher name: SpringerJournal Scope: LogicUnique features distinguishing this journal: please write here your opinion in this matter or write just "Applying Formal Methods to … Continue reading Help Studia Logica get into ISI

Gödel quote

Varol Akman kindly sent a link to this picture of the poster advertising the Gödel exhibition in Vienna, with the nice quote: "Today philosophy has arrived, at best, at the point mathematics was at in Babylonian times."