We are pleased to announce a sage-days workshop November 17-20, 2019 at 
Saint Louis University in Saint Louis MO, USA. The main focus is on 
functionality associated to the arithmetic of dynamical systems and 
related areas. We are fortunate to have funding via the National Science
 Foundation programs in Computational Mathematics and CDS&E for 
travel and local lodging for a limited number of participants. The main 
workshop website can be found at 
https://wiki.sagemath.org/days104. 
Requests for funding are made through the registration form on the 
workshop website. Those not requesting funding should still register so 
that we can have an estimate on number of participants for planning 
purposes. Information on arithmetic and complex dynamics in Sage can be 
found at 
https://wiki.sagemath.org/dynamics/ArithmeticAndComplex.
The
 official topic of the workshop is the arithmetic of dynamical systems. 
Anybody willing to learn or develop Sage is also welcome. As with most 
Sage-days workshops, the program will be elaborated on the first day of 
the workshop and adapted along the week. There will be tutorials, short 
specialized topics, and participant presentations, but most of the time 
will be dedicated to actual programming with the help of experience Sage
 developers. 
If you have any further questions, please contact any one of the organizers.
Sincerely,
Paul Fili
Oklahoma State University
paul.fili (at) okstate (dot) edu
Benjamin Hutz
Saint Louis University
benjamin.hutz (at) slu (dot) edu
Adam Towsley
Rocherster Institute of Technology
adtsma (at) rit (dot) edu