Global Virtual SageDays 109

an event for the SageMath user and developer community on the occasion of the release of SageMath 9.1

held on Thursday, May 28, 2020 (when it is that date in some timezone in the world)

a 50-hour fully virtual event. Schedule, videos, and materials at

SageDays are gatherings of people interested in SageMath, from newcomers to contributors. Sage Days have been organized as local, regional, or international in-person meetings by a wide range of people around the globe. Because of the current global health crisis, we organize SageDays 109 as the first fully virtual event in the series.

About SageMath

Sage is a mature, comprehensive, free (open-source) mathematics software system based on Python, licensed under the GNU General Public License, that integrates computer algebra facilities and general computational packages.

Sage, first released in 2005, in over a decade of incubation in the SageMath distribution, comprising 293 software packages, has grown its own library of 1000 Cython and over 4400 Python modules, ranging from sage.algebras.* over sage.geometry.* to sage.tensor.*, with a total of over 2.2 million lines of code.

SageMath 9.0, released in January 2020, completed the transition of the Sage library to Python 3.

How to participate


Schedule at

To offer or request additional presentations on specific topics, please edit and/or post a message in the zulip stream #sd109.

Confirmed Speakers

Introduction to Sage

Details TBA


We give step-by-step instructions on how to install Sage 9.1 from source.

Experienced developers will help if any problems appear.

Spontaneous celebrations on completed installations are encouraged.

Sage User Forum

We would love to hear from users of SageMath how they use Sage... in research, in education, in applications, ...

Share your Sage wishlist

Format: on Zulip

Organizer: Yuan Zhou, University of Kentucky, USA

Sage in Education Discussion

Moderator: Karl-Dieter Crisman, Gordon College, USA

Creating external packages

First steps and best practices in creating packages and Continuous Integration

Organizer: Samuel Lelièvre, Université Paris-Saclay

Introduction to Sage Development

For Sage users who wish to take the first (or the next) steps in Sage development.

Presentations: What's New in Sage 9.1


Organizer: Matthias Köppe, UC Davis, USA

SageMath, Mathematical Libraries, and the Landscape of Computer Algebra Software

SageMath builds upon many state-of-the-art mathematical libraries. In this iteration of the SageDays, we focus on FLINT: Fast Library for Number Theory on the occasion of the long-anticipated upcoming release 2.6. FLINT maintainer William Hart (TU Kaiserslautern) will give two presentations.

Farewell to Python 2 and six

print "Goodbye"

Big-picture Development Discussions



Trac tickets tagged with keyword sd109

Organizers of SageDays 109

... with contributions from other members of the Sage community

days109 (last edited 2020-06-01 19:19:52 by mkoeppe)