Natalie Portman is "5", if it is science, almost everyone may have "Erdos number"?

ByBigdmia

"Black · SwanWon the Best Academy Actress Award the other dayNatalie Portman,Harvard UniversityHe is said to have an Erdosch number "5" by coauthored paper when majoring in psychology.

If you've ever written a paper, what would you possibly have if you look at what "Erdosz number" is exactly what it represents?

Details are as below.Erdös Number Project - The Erdös Number Project - Oakland University

Eldesh number - Wikipedia

Although it is somewhat awesome number when hearing only the name "Erdezu number", in short, how many traces of co-authors of the article are tracedPaul Erdösch(Hungarian mathematician who collaborated with over 500 researchers in his lifetime and published as many as 1,500 papers). The number of persons who have collaborated with Eldish himself is "1", the number of persons with co-authored papers with the person of Eldesh number 1 is "2", and in the case of Nathalie Portman, "co-authors co-authors The co-author of co-authors co-authored was Erdosh ".

Natalie Portman became the real name of Natalie Hershlag in 2002NeuroImage"Magazine published in"Frontal lobe activation during object permanence: data from near-infrared spectroscopyWriting a paper entitled "One of the co-authorsAbigail A. BairdIn 2005Michael S. GazzanigaWithCoauthored paperThere was Michael S. Gazzaniga in 1989Jonathan D. VictorWithCoauthored paperJonathan D. Victor co-authored with J. Gillis in 1982 and J. Gillis co-authored the paper "Note on the transfinite diameter" in 1937 with Erdosh, so Nathalie Portman's Erdosz The number is "5".

If you have never co-authored a paper, it is impossible to have an Erdosu number, and for those who do not have an Erdosch number it is sometimes said that the Erdesch number is "infinity".American Mathematical SocietyOf the 400,000 authors of about 2 million articles published in the database of 268,000 people with a finite Eldesh number. It is said that 99.5% of them have Erdusu number 8 or less, the median of Erdos numbers is 5, the maximum value is 13 (5 out of 268,000 people), those with a finite Eldesh number of 15 or more do not exist in this world It is. this is,Small-world phenomenonThis is a good example of a good example of a good example, showing that the mathematics world is narrow.

People who have written mathematical papers may be able to look up their own Erdesch number from the following link.

MR: Collaboration Distance


This is a tool for examining the "proximity" of the two researchers, but instead of entering the second name, you can click on the option "use Eldish" to find out the Erdezu number.


If you enter the last name and the corresponding author exists in the database of the American Mathematical Society, you can choose the author from the pulldown.


Japan's firstFields AwardWinnerKodoh KodairaThe Eldesh number is 2,Shizuka Kadotani"Common acquaintance" It is "common co-author" It is becoming.


Famous for fractalBenoit MandelbrotThe Eldish number of 3.


That means that if it is a route through Erdosh, the distance between Kodaira Kunihiko and Benoit Mandelbrot should be "5", but in fact there is the shortest route not via Erdosh, and if you follow the co-authors of Kodaira Kunihiko It seems that it reaches Mandelbrot at first glance.


In addition to having collaborated with not only mathematics but also people in various fields, Erdosh himself has many other scientists in other fields with co-authors with mathematicians with Erdesch numbers, so not only mathematics but also medicine / science · Many people have surprisingly small Erdos numbers in various fields such as engineering and social science.

Those who have co-authored a paper even once in the past as a graduate thesis or a doctrine of the undergraduate course in the sciences may reach Erdosh if they follow the co-authors of the co-authors. Even those who left Japanese universities, if one of the coauthor of the paper is a professor who has the experience of studying abroad, encountering Erdosh in a place surprisingly close to co-authors from the professor's overseas papers etc There seems to be it.

Even if you do not have an Eldesh number at the moment, if a laboratory fellow who wrote a graduation thesis together co - authored with a co - author of a co - authorship of co - authors of Er - Desh at the doctoral course etc etc It is possible that we may acquire an Erdosu number (5 in this case) unnoticed. For example, a coauthor "B" of a past paper of the person "A" of the Eldesh number 6 co-authored the article with the person of the Eldesh number 3 thereafter, and the fact that "Er" of "B" reached 4, In the meantime, the erduche number of "A" has changed from 6 to 5.

IncidentallyAlbert EinsteinThe Eldish number of 2Ernst G. StrausPeople with a finite Eldesh number will add "2" to it and it will be "Einstein number". Of course there may be a shortest route not via Erdosh, but you can think of it as "the number of Erdechs + 2 = the upper limit of Einstein", "the number of Erdosz + 3 = the upper limit of the number of Mandelbrot". Some people are saying that "Co-authors of co-authors co-authors (Einstein)" says Erdish Connection, and some people say that "Co-authors co-authors (Nothalie Portman)" is a nice thing Is not there also?


Also, like the Erdosz number, if you follow the co-star of an actor,Kevin Bacon"Bacon number" (Bacon himself is "0", when playing with bacon "1", with a person who has worked with bacon "2") There is "The sixth gapAs if to support the theory, it seems that most actors in the world, not limited to Hollywood, are said to have bacon number 6 or less.

ByChairman of the Joint Chiefs of Staff

The combination of this bacon number and the Eldish number is called "Erdos - Bacon Count","New York, I love YouIn the case of Natalie Portman who has worked with Bacon in Bacon, the number of bacon is 1, so Erdos - Bacon number is 6. As a person with a limited number of Erdos - Bacon numbers in Hollywood elsewhere, mathematicians and actressesDanica / McAller(Eldesh number 4 · Bacon number 2) and neuroscientist and actressMayim Bialik(Eldesh number 5, Bacon number 2), and so on.

The world's smallest Eldish - Bacon number is the professor of applied mathematics at the Massachusetts Institute of TechnologyDaniel KleitmanIt is said that it is. Professor KleitmanGood Will HuntingAlthough I appeared as an extra when I was a mathematical advisor for "Good Will Hunting", one of the performersMinnie DriverIs "Sleepers"With Bacon, professor Kleitman will have 2 bacon numbers. Also, since Professor Kleitman has co-authored papers with at least 6 Erdosch, the Erdosch number is 1 and the Erdos-Bacon number combined of these two is 3.

By the way, in the chess world how many trainees are to trainPaul Morphe(1837-1884) to arrive at "Morphe numberThere seems to be things like things such as lateBobby FischerThe number of morphs is 4. It seems that the limit of Morphy number 4 can now approach Paul Morpy because all the players with Morphy number 2 or less have already left this world and a few Morphe numbers are active in the world with active work. It is said that there are millions of players in the world with a morphe number of 5, and it seems that cases where the number of Morphee is less than 6 is counted even if it is a very ordinary player.


Even in GoHidenobu MotohboFollowing the number of players until (1829-1862) "Number of good ideasThere is a thing called "the number of excellent measures 3"Kaoru Iwamoto(Kofuwa Honbo: 1902-1999), lateKinu valley(1909-1975),Kure Genku(1914-) and so on and the number of excellent players 4 or 5, the shogi player should be few as far as including the guidance game.

It is all genres such as "Oyama number" and "Hanyu number" in Shogi, "Tyson number" in boxing, "Player who has played in the same game" if it is soccer "Pele number" and "Maradona number" It may be interesting to try to set the distance between the player and the "reference person".