Olga Paris-romaskevich

Séminaire de la détente mathématique

I am a mathematician at CNRS. I work in the Mathematics Institute in Marseille, my area of interest is dynamical systems, often with some motivations from physics. My current work concerns the dynamics of tiling billiards and the Novikov's conjecture about plane sections of triply periodic surfaces, inspired by physics of conductivity.
My work is partially supported by the ANR (wonderful) GALS (ANR-23-CE40-0001).
I am a storyteller. I have some experience in filmmaking such as editing, script writing and directing. I am the author of a blog about ten Russian female mathematicians.I like spending time with people creating together. With the association Vagabond Mathematics that I co-founded, we draw the chalk art with us in the streets of Lyon.I am interested in interdisciplinary studies. Proud to work on a project of math and sociology book "Matheuses" with Claire Marc and Clémence Perronnet that will be in your libraries (in France) starting February 2024.I am part of SNCS (National syndicate of researchers), SMF (Société Mathématique de France) and Femmes et mathématiques. I am a member of European Mathematical Society Outreach and Engagement Committee. Very proud to be a member of scientific council of IMéRA.
I am an elected member of the scientific council of the mathematics institute of CNRS, CSI de l'INSMI.
If you are interested in some of my endeavours (research, outreach and art), subscribe to my newsletter! (which is mostly in French and sporadically in English).

My newsletter around math and art

News on research, mediation of mathematics and art projects, all of it mostly in France but who knows! The letter is sent each other month.
Your mail address is only used to send you the newsletter. You can at every moment unsubscribe by clicking on the link in any of the newsletters you will receive.


Université d'Aix-Marseille
Institut de Mathématiques de Marseille (I2M)
39, rue Frédéric Joliot Curie
13453 Marseille Cedex 13

Mail: write to me

The picture on the screen is made by Bertrand Paris-Romaskevich from a hill on Olkhon island, also called the heart of the lake Baikal.

Here are the initiatives that I am proud to have been a part of.

Recreational mathematics seminar in LYON (OR la détente)

Séminaire de la détente mathématique

Recreational mathematics seminar (known as Séminaire de la détente) started as a weekly seminar in the House of Mathematics and Informatics in Lyon MMI. I have created it in 2014 and co-organized this seminar with M. Lhuissier, V. Borelli, V. Seigneur, A. Rivera, L. Mathis and B. Sevennec. My dream was to create the space of exchange between people interested in math in Lyon -- students, professors, anybody, that would be fun and not too snobbish. And it worked quite well!
The seminar is still ongoing, check out their Facebook page.

May 12: Celebrating Women in Mathematics

May 12 is an international day of Celebration of Women in Mathematics that regroups initiatives all over the world. The tradition has been launched by our international collective in 2019. Check out the site, and participate every year, with an event in your laboratory! Here the article presenting the adventure of May12.

N. Agarwal, C. Araujo, P. Bonfert-Taylor, M. Mahmoudi, M. F. Ouedraogo, O. Paris- Romaskevich, M.-F. Roy, E. Strickland, A. V. Gajardo May 12: Celebrating Women in Mathematics, From One Idea to One Hundred Events, Notices of AMS, journal version (2019)

Journée parité no. 6 and no.7

I was a main organizer of the "Journée parité" of mathematical community in 2023, organized in ENS de Lyon. For more details on the meeting, see its webpage. The illustrations in live-sketching form were done by wonderful Lison Bernet all along the day. The next meeting will be organized in the Summer 2024, in Institut de Mathématiques de Marseille by Anne Pichon, Magalie Ochs, Peter Haïssinsky and myself.Here are some materials from these meetings :

J.-R. Chazottes, D. Gayet, O. Paris- Romaskevich, Sixième Journée parité en mathématiques : compte rendu, Gazette de la Société mathématique de France, version à découvrir en ligne (octobre 2023)

V. Dutrop, Mixité au travail et ses enjeux :
est-ce la fin de la répartition genrée du travail ?
, verbatim illustré par les images de Lison Bernet, mis en page par Olga Paris-Romaskevich (octobre 2023)

Here is a list of my preprints and publications, with when possible links to videos of talks and slides. All my math articles and preprints are on arxiv.


[A] O. Paris-Romaskevich Trees and flowers on a billiard table, rewrite in progress

[B] I. Dynnikov, P. Hubert, P. Mercat, O. Paris-Romaskevich, A. Skripchenko Novikov gasket has zero Lebesgue measure, work in progress

[C] P. Hubert, P. Mercat, O. Paris-Romaskevich Almost all minimal 4-reflections are not weakly mixing, work in progress

Published work

[10] S.Cantat, O. Paris-Romaskevich , J. Xie Free actions of large groups on complex threefolds, Bulletin of London Mathematical Society (2022), journal

[9] O. Paris-Romaskevich Tiling billiards and Dynnikov's helicoid, arxiv: 2102.10201, Transactions of the Moscow Mathematical Society, 82:1, 157-174 (2021)

[8] S.Cantat, O. Paris-Romaskevich Automorhisms of compact Kähler manifolds with slow dynamics, Transactions of American Mathematical society, journal (2020) | arxiv:2002.03615, hal-03089240

  • slides for Dynamics on your screen conference (August 2020)

[7] P. Hubert, O. Paris-Romaskevich Triangle tiling billiards and the exceptional family of their escaping trajectories: circumcenters and Rauzy gasket, Experimental Mathematics published online (2019) | arxiv:1804.00181

[6] O. Paris-Romaskevich Epicycles in the hyperbolic sky, Arnold Math J. 4(3), pp. 251-277, (2019) | arxiv: 1704.01339 | journal version | free journal version, no download

[5] Yu. Ilyashenko, O. Romaskevich Sternberg linearization theorem for skew products, Journal of Dynamical and Control Systems, Volume 22, Issue 3, pp. 595-614 (2016) | arxiv: 1505.05776 | journal version

[4] L.Bowen, A.Bufetov, O. Romaskevich, Mean convergence of Markovian spherical averages for measure-preserving actions of the free group, Geometriae Dedicata, 181 (1), 293-306, (2015) | arxiv: 1502.01797 | journal version

[3] O. Romaskevich, On the incenters of triangular orbits on elliptic billiards, L’Enseignement Mathématique (2) 60 (2014), 247–255 | arxiv: 1304.7588 | journal version

[2] A. Klimenko, O. Romaskevich , Asymptotic properties of Arnold tongues and Josephson effect, Moscow Mathematical Journal, volume 14, issue 2, pp. 367-384, (2014) | arxiv: 1305.6746 | journal version

[1] V. Kleptsyn, I. Schurov, O. Romaskevich Josephson effect and slow-fast systems (in Russian), Nanostructures. Mathematical physics and modelling, 8:1, pp. 31–46, (2013) | arxiv: 1305.6755 | journal version


Dynamics of physical systems, normal forms and Markov chains

I had a chance to work on my PhD under supervision of Étienne Ghys and Yulij Ilyashenko, between Russia and France. I have defended my thesis twice (certainly, in order to understand it better) in 2016, in Moscow and in Lyon in order to become кандидат наук and docteur en mathématiques.

Co-authors (in chronological order of collaboration)

Curriculum Vitae, short story

Séminaire de la détente mathématique


Moscow, 6th July 1990


2020 - now research scientist at CNRS and Marseille Mathematics Institute
2017 - 2019 post-doc at IRMAR at University of Rennes I
2016-2017 teaching and research assistant at UMPA at ENS de Lyon


2007-2012 mathematics and mechanics faculty of Moscow State University
2012-2016 graduate student at National Research University Higher School of Economic in Moscow and École Normale Supérieure de Lyon (working with Étienne Ghys and Yulij Ilyashenko)

Research prize

2016 L'Oréal-UNESCO prize for Women in Science


I speak and think in English, French and Russian.

Academic CV : last update : Sept 2023, CV in FrenchArtistic and translator CV : last update : Sept 2023, CV in FrenchSee also my LinkedIn account.

Cinema club in Lyon -- Bobines de sciences

I organise a cinema-club CinéMaths (2018-23) and now Bobines de Sciences (2023+) as a collaboration with a House of Math and Informatics (MMI) and a cinema Comœdia. For me this ciné-club is an occasion to make a science a tool for democratic debate, and to watch good movies together. To come to Bobines de Sciences, please make a reservation (a couple of weeks before the date of the event) on the site of the cinema. You can also follow the program on the page of MMI.

Séminaire de la détente mathématique

Programmation Bobines de Sciences 2023/2024
Tous les RDVs ont lieu samedis matin, à 11h, au cinéma Comoedia. Les dates de cinéclub sont fixées, notez-les des maintenant dans vos agendas, les films seront bientôt dévoilés !
4 Novembre : Astronomie et mémoire
Projection : Nostalgie de la lumière
Rencontre : (?)
3 Février : Faire des enfants et ectogénèse
Projection : The Pod generation
Rencontre : (?)
16 Mars : Rêves
Projection : Science des rêves
Rencontre : Perrine Ruby, chargée de reherche en neurosciences à l’INSERM
Rencontre en partenariat avec la Semaine du cerveau
18 Mai : Mathématiciennes à l'écran
Projection : Théorème de Marguerite
Rencontre avec Olga Paris-Romaskevich, co-autrice du livre Matheuses, suivie d'une dédicace
1 juin : Combat pour les droits humains en Russie
Projection : Manuel de libération
Rencontre : (?)

My work for movies on math

Séminaire de la détente mathématique

I can also do cinema not related to math and science!

Here are some of my personal filmic experiences : Ten trees, Une grue et une abeille and Poissons du Rhône. I also did several trailers for friendly theater companies in collaboration with Bertrand Paris-Romaskevich.At the moment, I am working as a translator on the project Knam - un théaêtre en Exil of Lionel Retornaz, telling a story of a theater that existed almost for 40 years at Komsomolsk-na-Amure and closed when Russian government started a full-scale war against Ukraine. All the actors left, and now live and work in Lyon.

Upcoming events

Here are the research conferences we can meet each other, outreach activities in which I participate, as well as some artistic projects and events. And join Cinémaths and Street math!



colorful memories

(le livre sort en librairies en février 2024)

Séminaire de la détente mathématique

Matheuses is an ongoing project of a book (in French) about girls in mathematics, in collaboration with a sociologist Clémence Perronnet and a science mediator Claire Marc. The writing is in progress, CNRS Éditions will publish it in February 2024.The genesis of the project. This project is born from the encounter between sociology and mathematics. From 2020 to 2023, I have been one of the organizers of a school for girls in mathematics called Cicadas in CIRM, Marseille. Clémence Perronnet, sociologist and specialist of social and gender inequality with respect to scientific culture, with her collaborator Alice Pavie, PhD student in sociology at the time, conducted a 2-week sociological observation study at our math school.Presentation of research project (by Clémence Perronnet). This research project aims to investigate the relationship between mathematics and society. The goal is to uncover the social processes and conditions that influence individuals' attitudes and engagement with maths and to better understand social inequalities in relation to science and mathematics. Groups such as women, people from working-class backgrounds and minorities are indeed underrepresented in scientific fields and careers. This is particularly true for women, and the recent French high school reform has exacerbated this issue, with the proportion of girls studying mathematics in high school declining significantly. The proportion of girls in high school maths suffered a 25-years set back. In 2021, one out of two girls (45%) no longer study maths in Première (which was the case for only 17% of girls in 2019).Content of the book. The book will mostly present the findings from a sociological survey conducted during the Cigales workshop, which was the first study of high school girls experiencing the reformed high school. Our book will combine sociology, mathematics, and drawing.A book for girls. We want this book to be a resource for girls who love mathematics by making visible other girls with similar interests and questions, and providing tools for overcoming difficulties by making them explicit. Additionally, the book will introduce teachers to sociological research to help them understand the key findings of social science on mathematics and science and to act for inclusion. Mathematics is not a pure and objective endeavor, it is a social activity, responsible for social inequality, that of class and gender.


  • 10 October 2022 An article describing the school Cigales is published in in the mathematical gazette (a journal of French Mathematical Society), and re-published on Images des Mathématiques, O. Paris-Romaskevich Vers une médiation en phase avec la société : réflexion autour des Cigales (2022)

  • 15 November 2022 Our project received a support prize Défi diffusion of INSMI at Assises des Mathématiques ! We will be able to pay Claire Marc for her mediation and graphics work, as well as organize two weeks of collaboration on the project.

  • December 2022 The video of the prize reception is online! You can see our (very nice :)) almost improvized speach at 2:34:30.

  • February 2023 We had a one week residence in CIRM to work on the book.

  • 5-10 June 2023 residence in Station Biologique de Roscoff to work on the book !

  • November 2023 You can already pre-order the book in some of French shops (Fnac for example)

  • December 2023 Institute of Mathematics of CNRS has launched Matheuses web-page in French

  • 11th February 2024 Previsional date of book coming out in the libraries in France

Séminaire de la détente mathématique

Picture made by Lison Bernet for the "Journée Parité" that I organized in 2023 in ENS de Lyon.


If you are interested in doing inclusive science (and in particular, math) outreach, and you read French, I recommend you the work of Clémence Perronnet to get you started thinking about how the scientific culture is constructed socially. The last link is the article presenting in more detail the Cicadas school and my thoughts about it.

I limit my plane travel as much as I can. I am a member of No fly climate sci and I have signed a manifesto Limitation of plane in math laboratories : horizon 2030.In the last two years I flew 0 km for work .
The last time I flew a plane for work was 21st September 2021, it was a 3000 km flight from Moscow to Lyon, and also the last time to this date I was in Russia.
I am very happy to come to any conference/seminar you invite me to if I can reach you by train. I am happy to take time to come to you by train.

My relationship with outreach changed a lot in the recent years, especially after grasping more and more how uneven the distribution of scientific culture is, and what role mathematical education plays in creating social inequality in France (see for example, the thesis by Margot Déage Le baccalauréat par specialités, vecteur de nouvelles inégalités d'accès aux études scientifiques ?) . This said, doing outreach activities has always brought me lots of joy and helped me to find meaning in my relationship with mathematics, it also opened many doors to me : from movie making to encounters with sociology. The doors I do not want to close anymore!For me, thinking about how to make mathematics more inclusive and less elitist (which is more or less equivalent if you think about it...), has become a sort of obsession. Mathematics is sooo not neutral and objective as I thought it was when I was starting to study it... This is a draft of a political project, join me if you are interested. :)

Mathématiques vagabondes

On the 12th May 2020 we have created with my friend Marie Lhuissier, a group Mathématiques Vagabondes. Our goal is to make art and science work together, with a particular attention to mathematics. Our main project at the moment (since 2020) is Streetmath, drawing mathematics in the streets of Lyon!

Séminaire de la détente mathématique

Математика : portraits of 10 Russian female mathematicians

МАТЕМАТИКА was thought as a chorus of voices of ten women joining into one song of Russia and its mathematics. This project was dreamt as an impression of modern Russian mathematics in many of its different aspects. Initially the project was planned as an exhibition to be presented at the World Meeting for Women in Mathematics, satellite of ICM2022. The project has been frozen since 24 February 2022 (see the statement on our site). Although, the in-detail blog telling the story of a trip through Russia that we made to prepare the exhibition is there for you to read. I hope to come back to this project one day. This is a joint project with a photographer Bertrand Paris-Romaskevich.

Mathematics of the sky

With my PhD sister Marie Lhuissier and my PhD brother Valentin Seigneur, we have created a website to share mathematics around planetary motion. This site has received a coup de coeur of Prix D'Alembert jury in 2018. Three of us have also written the texts for Mathematical Calendar 2021, under direction of Ana Rechtman, in the spirit of the mathematics of the sky. At the moment, the site is under maintenance but we will recover it !


I have been acting since 2016. It all started with improv theater, continued with clowning, and then with text theater, with a particular interest in the "Stanislavsky school".

Séminaire de la détente mathématique
  • Starting from the text of Moira Chas, we have created with Marie Lhuissier and Valentin Seigneur, a theater play Letters from the forth dimension, about a mathematician Alicia Boole, her work on regular polytopes of dimension 4, her relationship with her sister Lucy and life in Victorian England for a woman of her talent and ambition. Here is a link to the first public performance of the play, in la MMI.

  • Recently, I had an occasion to explore some clowning with mathematicians at Diablerets Outreach Conference (October 2022).

Conferences and performances

I like to explore different forms of mathematical storytelling, here are some eclectic projects I did, all of them somewhere on (one of the) borders between a math talk and a theater performance. I am open to opportunities that will challenge me to create new formats of mathematical storytelling.

(not too much lost in) Translation

I did translate into French a book without words... by Arseniy Akopyan. This book is called Figures sans paroles and is an ode to plane geometry. It is accessible at Amazon for now, and we are happy it exists in this way already! Although we hope to find an editing house in France to help us edit this book better.