Graph structure

In July 2016, Cosmin Ionita and Pat Quillen of MathWorks used MATLAB to analyze the Math Genealogy Project graph. At the time, the genealogy graph contained 200,037 vertices. There were 7639 (3.8%) isolated vertices and 1962 components of size two (advisor-advisee pairs where we have no information about the advisor). The largest component of the genealogy graph contained 180,094 vertices, accounting for 90% of all vertices in the graph. The main component has 7323 root vertices (individuals with no advisor) and 137,155 leaves (mathematicians with no students), accounting for 76.2% of the vertices in this component. The next largest component sizes were 81, 50, 47, 34, 34, 33, 31, 31, and 30.

For historical comparisonn, we also have data from June 2010, when Professor David Joyner of the United States Naval Academy asked for data from our database to analyze it as a graph. At the time, the genealogy graph had 142,688 vertices. Of these, 7,190 were isolated vertices (5% of the total). The largest component had 121,424 vertices (85% of the total number). The next largest component had 128 vertices. The next largest component sizes were 79, 61, 45, and 42. The most frequent size of a nontrivial component was 2; there were 1937 components of size 2. The component with 121,424 vertices had 4,639 root verticies, i.e., mathematicians for whom the advisor is currently unknown.

Top 25 Advisors

NameStudents
C.-C. Jay Kuo175
Egbert Havinga143
Roger Meyer Temam130
Pekka Neittaanmäki129
Shlomo Noach (Stephen Ram) Sawilowsky111
Andrew Bernard Whinston109
Alexander Vasil'evich Mikhalëv101
Ronold Wyeth Percival King100
Willi Jäger100
Erol Gelenbe95
Leonard Salomon Ornstein95
Kurt Mehlhorn93
Dimitris John Bertsimas92
Ludwig Prandtl90
Yurii Alekseevich Mitropolsky88
Bart De Moor88
Rudiger W. Dornbusch85
Wolfgang Karl Härdle83
Andrei Nikolayevich Kolmogorov82
Selim Grigorievich Krein82
Olivier Jean Blanchard82
David Garvin Moursund82
Stefan Jähnichen81
Sergio Albeverio81
Richard J. Eden81

Expand to top 75 advisors

Most Descendants

NameDescendantsYear of Degree
Abu Sahl 'Isa ibn Yahya al-Masihi218605
Abu ʿAli al-Husayn (Avicenna) ibn Sina218604
Bahmanyār ibn al-Marzubān218603
Ghiyāth al-Dīn Abū al-Fatḥ ʿUmar ibn Ibrāhīm al-Khayyām al-Nīsābūrī2186021068
Saraf al-Dīn Muhammad al-Masʿūdī al-Marwazī218601
Fakhr al-Dīn Muhammad al-Rēzī218599
Sharaf al-Dīn al-Ṭūsī218599
Kamāl al-Dīn Ibn Yūnus218598
Qutb al-Dīn Ibrāhīm al-Mīṣrī2185981222
Athīr al-Dīn al-Mufaḍḍal al-Abharī2185971264
Nasir al-Dīn al-Ṭūsī218596
Shams al‐Dīn al‐Bukhārī218593
Gregory Chioniadis2185921296
Manuel Bryennios2185911300
Theodore Metochites2185901315
Gregory Palamas2185871316
Nilos Kabasilas2185861363
Demetrios Kydones218585
Elissaeus Judaeus218560
Georgios Plethon Gemistos2185591380, 1393
Basilios Bessarion2185561436
Giovanni Conversini2185471363
Manuel Chrysoloras218547
Gasparino da Barzizza218546
Guarino da Verona2185461408

Nonplanarity

The Mathematics Genealogy Project graph is nonplanar. Thanks to Professor Ezra Brown of Virginia Tech for assisting in finding the subdivision of K3,3 depicted below. The green vertices form one color class and the yellow ones form the other. Interestingly, Gauß is the only vertex that needs to be connected by paths with more than one edge.

K_{3,3} in the Genealogy graph

Frequency Counts

The table below indicates the values of number of students for mathematicians in our database along with the number of mathematicians having that many students.

Number of StudentsFrequency
0230871
131635
211555
36586
44606
53448
62634
72138
81747
91450
101179
11978
12901
13744
14631
15547
16493
17405
18347
19317
20287
22246
21236
23210
24175
25166
26141
27126
28121
29102
3086
3176
3464
3262
3356
3655
3552
3738
3937
3832
4231
4127
4326
4025
4523
4622
4420
5118
5218
5416
4915
5315
4813
5013
5713
4711
5510
5610
609
688
587
617
637
596
646
726
655
695
705
624
824
713
733
753
783
813
672
742
762
772
882
952
1002
661
791
801
831
851
901
921
931
1011
1091
1111
1291
1301
1431
1751