Blog Archives

Le Monde puzzle [#849]

January 18, 2014
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Le Monde puzzle [#849]

A straightforward Le Monde mathematical puzzle: Find a pair (a,b) of integers such that a has an odd number d of digits larger than 2 and ab is written as 10d+1+10a+1. Find the smallest possible values of a and of b. I ran the following R code which produced a=137 (and b=83) as the unique

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MCMSki IV [mistakes and regrets]

January 12, 2014
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MCMSki IV [mistakes and regrets]

Now that the conference and the Bayesian non-parametric satellite workshop (thanks to Judith!) are over, with (almost) everyone back home, and that the post-partum conference blues settles in (!), I can reflect on how things ran for those meetings and what I could have done to improve them… (Not yet considering to propose a second

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MCMSki IV [day #3]

January 8, 2014
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MCMSki IV [day #3]

Already on the final day..! And still this frustration in being unable to attend three sessions at once… Andrew Gelman started the day with a non-computational talk that broached on themes that are familiar to readers of his blog, on the misuse of significance tests and on recommendations for better practice. I then picked the

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MCMSki IV [day 1.5]

January 7, 2014
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MCMSki IV [day 1.5]

The afternoon sessions I attended were “Computational and Methodological Challenges in evidence synthesis and multi-step” organised by Nicky Best and Sylvia Richardson and “Approximate inference” put together by Dan Simpson. Since both Nicky and Sylvia were alas unable to attend MCMSki, I chaired their session, which I found most interesting as connected to a recurrent

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #18)

January 6, 2014
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #18)

MCMSki IV is about to start! While further participants may still register (registration is still open!), we are currently 223 registered participants, without accompanying people. I do hope most of these managed to reach the town of Chamonix-Mont-Blanc despite the foul weather on the East Coast. Unfortunately, three speakers (so far) cannot make it: Yugo

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #17)

January 3, 2014
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #17)

We are a few days from the start, here are the latest items of information for the participants: The shuttle transfer on January 5th, from Geneva Airport to Chamonix lasts 1 hour 30 minutes. At your arrival in the airport , follow the “Swiss Exit”. After the customs, the bus driver (handling a sign “MCMC’Ski

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #16)

December 30, 2013
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #16)

I am now in Chamonix, a week before MCMSki IV. The town is packed with tourists from all over Europe, English being the dominant language. There is not much snow so far, even though some runs reach town. (I did ski in the nearby Les Houches today and the red runs were either icy or

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Le Monde puzzle [#847]

December 28, 2013
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Le Monde puzzle [#847]

Another X’mas Le Monde mathematical puzzle: A regular dice takes the values 4, 8 and 2 on three adjacent faces. Summit values are defined by the product of the three connected faces, e.g., 64 for the above. What values do the three other faces take if the sum of the eight summit values is 1768? 

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #14)

December 26, 2013
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #14)

The programs of the talks, posters and workshop are now printed and available on Speaker Deck (talks, posters, workshop). Please let me know if you spot anything wrong (even though it will not be reprinted!). This is presumably the last news item till Jan. 5 as I am almost off to Chamonix for a week

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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #14)

December 21, 2013
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MCMSki IV, Jan. 6-8, 2014, Chamonix (news #14)

We are quite glad to announce that, thanks to the support of several publishers (CRC Press/Taylor & Francis, Elsevier, and Springer-Verlag), there will be book prizes for both poster nights at MCMSki IV ! I was reminded of this possibility during O-Bayes 2013 and those publishers reacted both quickly and positively to my request (and

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