Re: Wikipedia mathematical search engine
Daniel Mietchen <daniel.mietchen <at> googlemail.com>
2012-04-04 02:35:13 GMT
a good example - abstractions like that from
dr_t = a(b-r_t) dt + \sigma dW_t
dx_t = \theta (\mu-x_t)\,dt + \sigma\, dW_t
are indeed very useful and an invitation to play.
On Wed, Apr 4, 2012 at 3:03 AM, Jozef Misutka <misutka <at> ksi.mff.cuni.cz> wrote:
> Hi Daniel,
> On Tue, Apr 3, 2012 at 12:15 AM, Daniel Mietchen
> <daniel.mietchen <at> googlemail.com> wrote:
>> Hi Jozef,
>> I just played around a bit and liked what I saw, though I didn't see
>> much, as the site was very slow.
> it was a HW failure (RAID5 I think...). Anyway, it was fixed several hours
>> How did you strip the dump of the non-mathematical articles?
> Very simply: a mathematical article is an article which contains "</math"
> I do not claim to have a perfect Wikipedia tag parser but the vast majority
> of the formulae in Wikipedia are typeset using standard Wikipedia rules and
> are simply inside text which is fine.
>> I am
>> asking because one of the major uses that I have in mind for a good
>> mathematical search engine would be to identify areas around topic A
>> (say, theoretical biology) that use the same concepts as those in
>> topic B (say, economics). Very often such distant fields are only
>> weakly connected, but solutions or approaches that work in one of them
>> are not infrequently transferable.
> That is exactly one of the interesting applications for a mathematical
> search engine.
> I wanted to reply to you with something interesting, so I called my friend
> asking him about interesting formulae from economy. He told me about Vasicek
> model, so I tried to search for the formula
> dr_t = a(b-r_t) dt + \sigma dW_t
> which resulted in 2 hits at no abstraction level - no big deal. But then I
> tried to abstract it and another hit came which is imho interesting
> (different variables used but the same formula).
> Vasicek model
> Vasicek model and similar
>> In order to be useful for such
>> purposes, your corpus would still have to contain the economics/
>> theoretical biology articles (at least those that use equations), but
>> I couldn't find evidence for that.
> See the number of documents (and categories) when you search for simple text
>> On Mon, Apr 2, 2012 at 2:21 PM, Jozef Misutka <misutka <at> ksi.mff.cuni.cz>
>> > Hi,
>> > I want to introduce a *mathematical* search engine working over English
>> > Wikipedia dump. The key advantage is simple - *it works* ;).
>> > Better than a nice speech is a real demo which can be found here:
>> > http://egomath.projekty.ms.mff.cuni.cz
>> > If you are somehow interested or just want to share your thoughts do not
>> > hesitate to contact me.
>> > Best regards,
>> > Jozef Misutka
>> > __________________________________
>> > Charles University in Prague,
>> > Department of Software Engineering,
>> > www: http://www.ksi.mff.cuni.cz/cs/~misutka
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