The registration rates are as in the following tables. All attendees pay a virtual conference fee. In-person participants pay an additional in-person conference fee. In both cases, there are discounted rates for ACM/SIGSAM Members and for students/retirees. The registration rates are in USD. Please note that no cash registration will be possible and that all registrations should be made through the online registration system (see below).


*** Changed on May 27: new, reduced virtual conference fees! ***


*** Changed on June 4: for a technical reason, the registration site will present the total fee (virtual + in-person) for in-person participants. ***


Online registration

Now open: Please register at


Cancellation policy

Cancellations must be submitted in writing by email to For the online participants, all cancellations received on or before July 15, 2021, are entitled to a refund, minus a $5 processing fee. For the on-site participants, all cancellations received on or before June 27, 2021, are entitled to a refund, minus a $5 processing fee. No refunds will be given after the respective dates.


Local support

Thanks to a grant by the Simons Foundation, a number of slots are available for supporting preferably young researchers and students, but not only, by covering local costs or/and travel. Please apply to NO LATER THAN JUNE 12, 2021. A notification of those applicants who will be supported will be sent by June 15. Some constraints may apply, notably, travel tickets need to be bought by the organizers. Please inquire for details.



Visa invitations can only be issued from Saint Petersburg. Please find details at and inquire via

However, visa support letters from ACM may also be useful for some of the participants. Please see the following page for the procedure to request one: