From the folklore of network analysis: The Erdos-Bacon number

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I have just discovered that I have an entry on IMDb through Director Dola Bonfis‘ documentary film Tankens Anatomi (The anatomy of thought). It is from 1997 but I do not recall seeing an entry for the film nor me on IMDb before. It almost makes it easy to compute my Bacon number. The Web-service The Oracle of Bacon allows you to type in name of two IMDb-listed people and it will then find the shortest path. However, I don’t seem to be present in The Oracle of Bacon database. Danish Entertainer, scientist and author Peter Lund Madsen also appears in the Tankens Anatomi movie, and he is present in the Oracle. Depending on the options set in The Oracle of Bacon it is possible to get to Kevin Bacon, although we need to go over, e.g., Mr Nice Guy which is just a recorded comedy show released on video. Mr Nice Guy features Trine Dyrholm who is a “proper” actress and from her it gets easy, e.g., by P.O.V. to Gareth Williams and Digging to China with Kevin Bacon. So it seems that I have a Bacon number of 4.

My combined Erdos-Bacon number then drops to 7.

In our research group we have relatively low Erdos numbers since our hub, Professor Lars Kai Hansen, wrote the concisely titled paper Neural Network Ensembles with Peter Salamon, – a researcher with an Erdos number of 1. The Hansen-Salamon paper from 1990 has become the most cited from our department (as far as I can determine). With Lars Kai I have written a large number of articles, e.g., Modeling of activation data in the BrainMapTM database: Detection of outliers.

Seven is still far from the five of Kiralee Hayashi, a former gymnastics champion, former scientist and present actress. According to her LinkedIn Profile she has worked at the Laboratory of Neuro Imaging (LONI), – a well-known neuroimaging research group. With noted neuroimaging researcher Paul Thompson she is on the author list together with big shot mathematician Shing-Tung Yau who has a Erdos number of 2, – according to Paul Thompson’s Wikipedia-cited Erdos number page. Their paper is Brain Surface Parameterization Using Riemann Surface Structure.

Now I have been trying to compute my Hayashi-Hayashi number. This must be 12 or less. Paul Thompson has a Hayashi-science number of one and through In vivo evidence for post-adolescent brain maturation in frontal and striatal regions Californian Terry Jernigan gets an Hayashi-science number of 2. (See also entry for the paper in the Brede Wiki). Terry is also in our Danish CIMBI brain project and with Jan Kalbitzer’s interesting neuroimaging seasonality paper Seasonal Changes in Brain Serotonin Transporter Binding in Short Serotonin Transporter Linked Polymorphic Region-Allele Carriers but Not in Long-Allele Homozygotes, where both Terry and I are in the author list, I will get a Hayashi-science number of just 3!

Allowing for the documentary/video trick and with Kiralee Hayashi and Trine Dyrholm in The Oracle of Bacon I get a Hayashi-film number of 5, and my Hayashi-Hayashi number then becomes 8.

What a small world.

(minor edit: 2012-10-16)



One thought on “From the folklore of network analysis: The Erdos-Bacon number

    […] have written before of data mining a co-author graph for the Erdös number and “Hayashi” number, and I […]

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