Timeline for How likely am I to be descended from a particular person born in the year 1300?
Current License: CC BY-SA 3.0
24 events
| when toggle format | what | by | license | comment | |
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| Apr 23, 2017 at 17:09 | history | edited | kjetil b halvorsen♦ |
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| Nov 26, 2012 at 19:37 | answer | added | Tim | timeline score: 2 | |
| Oct 28, 2011 at 19:20 | history | notice removed | xpda | ||
| Oct 28, 2011 at 19:20 | history | bounty ended | xpda | ||
| Oct 28, 2011 at 19:20 | vote | accept | xpda | ||
| Oct 27, 2011 at 7:47 | answer | added | Erad | timeline score: 0 | |
| Oct 26, 2011 at 0:23 | answer | added | whuber♦ | timeline score: 14 | |
| Oct 25, 2011 at 21:03 | answer | added | Wipa | timeline score: 0 | |
| Oct 25, 2011 at 9:09 | answer | added | Erad | timeline score: 0 | |
| Oct 24, 2011 at 16:19 | comment | added | Michael McGowan | I believe there is some academic research on the probability of a unique surname going extinct. Although not identical to the problem posed, that might provide some interesting insight (but unfortunately I can't remember where it's from). Oddly enough, I believe those studies led to some insight in the math behind the spread of infectious disease... | |
| Oct 24, 2011 at 15:25 | comment | added | whuber♦ | To get an initial sense of the answers, consider the fraction $f$ of the population that is not related to a given ancestor by descent. Initially $f = (n-1)/n$ for a population of $n$. With random mixing, $f$ is squared after each generation. In a starting population of $n=10^8$, say, this implies $f$ is almost surely $0$ after $32$ generations (about $600$ - $800$ years). | |
| Oct 24, 2011 at 3:38 | answer | added | vqv | timeline score: 3 | |
| Oct 24, 2011 at 3:02 | history | notice added | xpda | Draw attention | |
| Oct 24, 2011 at 3:02 | history | bounty started | xpda | ||
| Oct 22, 2011 at 19:28 | history | edited | xpda | CC BY-SA 3.0 |
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| Oct 22, 2011 at 15:11 | history | edited | xpda | CC BY-SA 3.0 |
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| Oct 22, 2011 at 14:57 | history | edited | xpda |
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| Oct 22, 2011 at 14:56 | comment | added | xpda | I am just curious. I am not a student and this is not anybody's homework. I was just joking about the extra credit, although I can see how it would imply homework. | |
| Oct 22, 2011 at 14:44 | history | edited | user88 | CC BY-SA 3.0 |
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| Oct 22, 2011 at 13:10 | comment | added | cardinal |
@John: Thanks for your edit. I believe the prevailing consensus (on this site and others) is that we not edit questions simply to add the homework tag. It is better for all involved to let the OP do that. You might be interested in this meta thread if you haven't already seen it.
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| S Oct 22, 2011 at 4:16 | history | suggested | John Doucette |
Added homework tag.
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| Oct 22, 2011 at 4:06 | history | tweeted | twitter.com/#!/StackStats/status/127596566700761089 | ||
| Oct 22, 2011 at 2:39 | review | Suggested edits | |||
| S Oct 22, 2011 at 4:16 | |||||
| Oct 22, 2011 at 2:15 | history | asked | xpda | CC BY-SA 3.0 |