Skip Garibaldi

associate director @ UCLA Institute for Pure & Applied Mathematics and professor @ Emory University Dept of Math & CS

Suspicious lottery winners in California on KCBS tonight

I previously collaborated with reporters in Florida (Lawrence Mower with the Palm Beach Post) and Georgia (Sean Sposito from the Atlanta Journal-Constitution) to identify people who have claimed “suspiciously many” … Continue reading

October 30, 2014

Gambrinus Fellow at TU Dortmund

I’ll be the Gambrinus Fellow at TU Dortmund in October, where I’ll give a 4.5 hour course on algebraic groups and a public lecture.  Stop by if you’re in the … Continue reading

September 19, 2014

Georgia lottery has a serious problem with ticket aggregators

Previously, I worked with Lawrence Mower from the Palm Beach Post, Philip Stark from UC Berkeley, and Richard Arratia from USC to expose ticket aggregators in Florida, and since then … Continue reading

September 18, 2014

New information about the “luckiest woman on earth”

A new series of articles by Peter Mucha at The Philadelphia Inquirer gives some new insight into Joan Ginther, who won four big prizes from Texas Lottery scratcher tickets.  (I helped out … Continue reading

July 1, 2014

Linear preservers paper published

Hernando Bermudez, Skip Garibaldi, and Victor Larsen, “Linear preservers and representations with a 1-dimensional ring of invariants”, Transactions of the American Mathematical Society 366 #6 (2014), 4755-4780.  DOI: 10.1090/S0002-9947-2014-06081-9

June 20, 2014

Math leads to law enforcement activity

I did some mathematical consulting for an investigative report about lottery hijinks done by the Palm Beach Post. The Florida lottery responded quickly and raided the stores frequented by the … Continue reading

April 10, 2014

Spring 2014 general audience lectures

My upcoming general audience lectures for spring 2014, with date and venue: 4/2: Emory University, with Lawrence Mower 4/24: Tufts University 4/28: UCLA, with Lawrence Mower and Philip Stark 6/27: … Continue reading

March 24, 2014

On 20/20

I’ll be on 20/20 tonight 10 eastern/9 central talking about how casting out the nines (modular arithmetic mod 9) doesn’t predict the future.

March 22, 2014

IPAM tourist tips

Food I recommend using Yelp to find restaurants. Here are some places that our visitors have remarked on as being good and reasonably priced. Quick serve: Diddy Riese (map): cookies and … Continue reading

February 10, 2014

New preprint on the birthday problem

New preprint [], joint with Richard Arratia (a probabilist) and Joe Kilian (a computer scientist) on the birthday problem: how many people do you need to have c birthdays in common?  Perhaps surprisingly, the results … Continue reading

October 28, 2013