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Posted: Wed Oct 05, 2011 4:33 pm UTC
My number is arguably 4. I once got help on my chemistry lab report from my granddad, who was Erdos-3, so yeah. It wasn't published, but I still say it counts.

Posted: Thu Oct 06, 2011 4:47 am UTC
I'm going to be a 5! Although not according to the Collaboration Distance Calculator. That has me as a 6. But searching coauthors of my coauthor shows that I'm a 5. I'm being published in the European Physical Journal Plus. A (not quite publication) draft is here.

Posted: Mon Oct 10, 2011 12:57 pm UTC
jaap wrote:
njperrone wrote:
jaap wrote:And I thought is was common knowledge that sums can only be taken over a countable number of things, and Sigma notation implies that. Summing over an uncountably infinite number of things is impossible, unless you use infinitesimals and that just results in integration.

That statement is itself a contradiction. Because infinity itself is uncountable.

The integers are countably infinite, which is what I meant with countable in the above. The reals are uncountably infinite. The latter means roughly speaking that you cannot use an index number xi to count off all the reals, even if you could count for an infinite amount of time.

Even if some time has passed I really need to say something: when you write in an environment that defines itself as mathematic, you have to be precise. "Infinitesimals" and "infinity itself" are, among others, NON precise mathematical concepts. Actually you can define sums of numbers, even infinite ones (cardinals or ordinals), over a set of indices of any nature, even uncountable (obviously it has to be a set, as defined for example with the Zermelo-Fraenkel-Choice axioms; you cannot define a sum over the paradoxical set of Russell, as far as I know). As a reference I suggest you read the first volume of N.Bourbaki work: "Set Theory", chapter III.

However, in order to be not so much off-topic, my Erdõs number is less or equal than 6.

Posted: Mon Oct 10, 2011 11:10 pm UTC

Posted: Sat Oct 29, 2011 4:53 am UTC
I'm too young (and also not Gauss) to have written any papers yet, but my girlfriend's grandfather has an Erdős number of 1. So I like to pretend I have a 3-point-something.

Posted: Sat Oct 29, 2011 6:12 pm UTC
QuigleyQ wrote:I'm too young (and also not Gauss) to have written any papers yet, but my girlfriend's grandfather has an Erdős number of 1. So I like to pretend I have a 3-point-something.

Cool!

Out of curiosity, do you mind if I ask you who your girlfriend's grandfather is/was?

Posted: Sat Oct 29, 2011 6:37 pm UTC
skullturf wrote:
QuigleyQ wrote:I'm too young (and also not Gauss) to have written any papers yet, but my girlfriend's grandfather has an Erdős number of 1. So I like to pretend I have a 3-point-something.

Cool!

Out of curiosity, do you mind if I ask you who your girlfriend's grandfather is/was?

Seymour Schuster. The papers were on graph theory, so I understood the first half-page. And that's it. :\ http://www.emis.de/classics/Erdos/cit/76705089.htm http://www.emis.de/classics/Erdos/cit/47905054.htm

### Re:

Posted: Fri Nov 25, 2011 8:17 am UTC
cmacis wrote:But there can be only one 0, also no more 1s are possible. If you hunt out the 1s you might get a 2.

The people with Erdos numbers 1 and 2 are listed online. No one bothers with the 3s, because there are so many of us. (Sniff!)

Yes, I'm a 3 ... Erdos -> Nesetril -> Robin Thomas -> me.

Interestingly enough ... I had a cold when Erdos was vising UNL, and Earl Kramer asked whether I wanted to be introduced. I declined, deciding that it would probably not look good if I ended up being the person who gave Erdos a cold which killed him. (I saw him at Georgia Tech a couple of times, including once about a month before he died.

Ine of these times was when I had been invited to GT for graduate school, and Dad and I were checking out the place. When we walked by an office, Craig Tovey was explaining something to Erdos, who looked almost asleep. In fact, Dad later said that he wanted to yell out, "He's not paying attention to you! He's asleep!" Of course, I later told him who the almost-asleep guest was ...)

Posted: Fri Dec 23, 2011 7:52 am UTC
Finally wrote my first paper. Hopefully many, many more to follow.

http://arxiv.org/abs/1112.3952

### Re: Re:

Posted: Thu Feb 02, 2012 9:15 pm UTC
Proginoskes wrote:
cmacis wrote:But there can be only one 0, also no more 1s are possible. If you hunt out the 1s you might get a 2.

The people with Erdos numbers 1 and 2 are listed online. No one bothers with the 3s, because there are so many of us. (Sniff!)

Yes, I'm a 3 ... Erdos -> Nesetril -> Robin Thomas -> me.

I'm a 3 as well. Erdos -> Selfridge -> Cohen -> me. I think half the people in my department are 3's.

Posted: Thu Feb 02, 2012 10:35 pm UTC
delooper -- we may or may not know each other. Of course, different people reveal different amounts of information about themselves on the internet, but I am a mathematician who's originally from British Columbia and did my BSc and PhD in that province.

(I'm also a 3 by the way.)

Posted: Tue Feb 07, 2012 8:30 am UTC
skullturf wrote:delooper -- we may or may not know each other. Of course, different people reveal different amounts of information about themselves on the internet, but I am a mathematician who's originally from British Columbia and did my BSc and PhD in that province.

(I'm also a 3 by the way.)

No, I'm pretty sure we don't know each other. I got my B.Sc at U.Alberta, Ph.D at Cornell, 4 postdocs (NY, Oregon, MPI Bonn, IHES France) later and I'm in BC.

Posted: Fri Mar 09, 2012 3:01 am UTC
My most recent paper (well, preprint) is arXiv:1203.1633 [cs.CC], which is by far the most fun paper I've written. My Erdos number is 3, through this paper with Man-Duen Choi.

Posted: Sun Mar 11, 2012 8:23 pm UTC
NathanielJ wrote:My most recent paper (well, preprint) is arXiv:1203.1633 [cs.CC], which is by far the most fun paper I've written. My Erdos fish is 3, through this paper with Man-Duen Choi.

Your article got a mention in a weekly maths podcast if you're interested. http://pulse-project.org/node/417 time - 41:30.

Posted: Mon Mar 12, 2012 1:58 pm UTC
Talith wrote:Your article got a mention in a weekly maths podcast if you're interested. http://pulse-project.org/node/417 time - 41:30.

Posted: Sun Apr 01, 2012 11:53 pm UTC

The paper with Raeburn gives me Erdos number 4.

I'm not allowed to post links

Posted: Fri Jun 22, 2012 12:49 pm UTC
My Erdos number = 4, too

Posted: Thu Jul 25, 2013 12:20 am UTC
2 (through Ronald Graham). Yesssssss

Here's the paper! We prove that the internet exists, unless a wire costs an integer number of dollars.

Posted: Wed Oct 16, 2013 10:41 pm UTC
I don't yet have a published paper, but someone is writing a paper based on work I helped with, so if I wind up getting co-author credit on that then I will finally have a finite Erdos number (6, if I got it right)!

Posted: Wed Oct 23, 2013 12:03 pm UTC
My first paper: http://arxiv.org/abs/1308.6498. Local linear models can act as universal approximators even with randomly assigned (fixed) operating points, and an upper bound on the required number of models is given.

Since I am the sole author, I don't have an Erdos number

Posted: Wed Dec 03, 2014 3:36 am UTC
A fun paper about the complexity of the video game Braid. Link.

Some of you may remember this from the GISHWHES thread a billion years ago. (Long story short: Misha Collins never asked me to go on a pirate ship, so I chose not to give him an Erdos number of 3.)

Posted: Thu May 28, 2015 7:30 pm UTC
Just found out I'll be having a article I wrote years ago published soon. It would give me an Erdos number of 3. I had lost hope in the article ever being published so this is a surprise, but a nice one. I'll link it when it becomes available.

Edit: As promised: http://www.mitpressjournals.org/loi/neco#/doi/full/10.1162/NECO_a_00769

Me -> Vempala -> Lovasz -> Erdos.

Now to work on getting a Bacon number...

Posted: Fri Feb 05, 2016 11:01 pm UTC
My parents are both biologists (the father, in particular, really sucks at math), but they both have Erdos numbers of 5 (through an article they both coauthored, and by several other paths for the father).
I, however, despite being a mathematician, have no Erdos number, because I do not (yet) have any published papers (though my rather awful poetry had appeared in several published collections).

I was also one of the big participants in the hunt for 18th century people with finite Erdos numbers (that culminated in the result shown at the bottom of Erdos Number Project's "Paths to Erdos" page).

Posted: Mon Apr 11, 2016 12:20 am UTC
My Erdos number is undefined. I disagree with the general concept of the Erdos number because I (and many others) will never get a chance to publish a paper with Paul Erdos because he is dead.