![Gabriel Cunningham](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/Headshot-253x300.png)
Gabriel Cunningham
Navigating Data on Polytopes and Maps
University of Massachusetts Boston
United States of America
![Maria Elisa Fernandes](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/IMG_4078-scaled-e1621539394972-267x300.jpg)
Maria Elisa Fernandes
Abstract regular polytopes for symmetric and alternating groups
Universidade de Aveiro
Portugal
![Gareth Jones](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/Gareth-jones.jpg_SIA_JPG_fit_to_width_INLINE-e1621539436956-243x300.jpg)
Gareth Jones
Paley Graphs
University of Southampton
United Kingdom
![Klavdija Kutnar](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/Kutnar-e1621539736376-257x300.jpg)
Klavdija Kutnar
On intersection densities of transitive groups and vertex-transitive graphs
University of Primorska
Slovenia
![Primož Šparl](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/Sparl-e1621539687181.png)
Primož Šparl
Some topics on tetravalent graphs admitting half-arc-transitive group actions
University of Ljubljana
University of Primorska
Slovenia
![Pablo Spiga](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/Me-e1621540307759-256x300.png)
Pablo Spiga
The beauty of counting Cayley graphs
Università degli Studi di Milano-Bicocca
Italy
![Klara Stokes](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/06/Klara-Stokes-225x300.jpg)
Klara Stokes
Rigid configurations of points and lines in the plane
Umeå University
Sweden
![Gabriel Verret](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/biggest.png)
Gabriel Verret
Compatible local actions in arc-transitive digraphs
University of Auckland
New Zealand
![Jinxin Zhou](https://sigmap.community.uaf.edu/wp-content/uploads/sites/897/2021/05/8208-300x297.jpg)
Jin-Xin Zhou
On primitive 2-closed permutation groups of rank at most four
Beijing Jiaotong University
China