Dear TIME 2000 Students, I hope you are all well, staying healthy, and staying vigilant with regard to the COVID-19 restrictions. The Math Museum has a free online event that may be of interest to you. See details, below. Enjoy the rest of the summer! Mrs. Weinman From: National Museum of Mathematics <functions@momath.org> Sent: Sunday, July 26, 2020 10:45 PM To: Naomi Weinman <Naomi.Weinman@qc.cuny.edu> Subject: Number Theory Problems: From Easy to Undecidable — August 5, 4:00pm and 7:00pm EDT (New York) EXTERNAL EMAIL: please report suspicious content to the ITS Help Desk. Dear MoMath friends, August is right around the corner, so make your plans for Math Encounters now! Next up, MIT Distinguished Professor in Science Bjorn Poonen will explore "Number Theory Problems: From Easy to Undecidable" on Wednesday, August 5, at 4:00 pm and 7:00 pm EDT (New York). Rational numbers are fractions such as -2/7. It turns out that the circle x2+y2=3 has no points whose coordinates are rational numbers, while the circle x2+y2=5 has infinitely many. Why do these equations behave so differently? What about more complicated equations: is there a method to decide whether there are any solutions in rational numbers? Join us as a search for answers leads to questions about prime numbers, geometry, and problems that a computer will never be able to solve. Registration is free. Choose from two online sessions: Sign up<https://momath.org/wp-content/plugins/civicrm/civicrm/extern/url.php?u=5001&qid=31699972> for Wednesday, August 5 at 4:00 pm EDT (New York) Sign up<https://momath.org/wp-content/plugins/civicrm/civicrm/extern/url.php?u=5002&qid=31699972> for Wednesday, August 5 at 7:00 pm EDT (New York) Math Encounters is MoMath’s popular free public presentation series celebrating the spectacular world of mathematics, produced with support from the Simons Foundation. Learn more at mathencounters.org<https://momath.org/wp-content/plugins/civicrm/civicrm/extern/url.php?u=5003&qid=31699972>. Regards, National Museum of Mathematics Support MoMath at momath.org/contribute<https://momath.org/wp-content/plugins/civicrm/civicrm/extern/url.php?u=5004&qid=31699972> momath.org 212-542-0566 11 E 26th St New York, NY 10010 United States