## Girls’ Angle Bulletin, Volume 14, Number 6

Volume 14, Number 6 opens with an interview with Sarah Bryant, a lecturer at Gettysburg College. Sarah brings a valuable and unique perspective to the mathematics profession and to becoming a mathematician. She is involved with many activities that draw people into mathematics, such as by creating the Shippensburg Area Math Circle for 4th and 5th graders. She has also applied mathematics to the study of questions in biology, specifically, she studied nematocysts in jellyfish. Normally, we truncate the interview for the electronic version, but you’ll find the complete interview with Sarah online.

Following the interview, three Girls’ Angle members, Eva Arneman, Altea Catanzaro, and Saideh Danison, present a game they created at the Girls’ Angle club and beautifully explain their winning first player strategy when this game is played on the edges of a tetrahedron. There are many follow-up questions that one can ask about this game, such as, on what graphs does the first player have a winning strategy? We hope some readers will have as much fun thinking about the possibilities as these three! Our cover is inspired by the game and created by Juliette Majid.

Next, we welcome Anna Ma of UC Irving, who authors our latest installment of The Needell In The Haystack. Anna earned her PhD under the supervision of series creator Deanna Needell. The importance of Data Science just grows and grows as the world becomes more digitized. We consider ourselves very fortunate to have this ongoing series. Deanna earlier wrote about the Kaczmarz algorithm, and in this issue, Anna Ma gives her own take on it.

The concluding half of Jovana Andrejevic’s article on paper crumpling comes next. She compares and contrasts crumpling with deliberate paper folder (such as paper folding as practiced by origami enthusiasts). Although crumpling doesn’t enjoy certain precise theorems that origami folding does, there are hints that there is some unrecognized hidden geometric structure to paper crumpling. Perhaps you can find it?

We conclude with solutions to the Summer Fun problem sets by Laura Pierson (on Wythoff’s game) and AnaMaria Perez and Josh Josephy-Zack (on Fibonacci partitions). We’re delaying solutions to Fan Wei’s probability problem set to honor a reader request.

We hope you enjoy it!

Finally, a reminder: when you subscribe to the Girls’ Angle Bulletin, you’re not just getting a subscription to a magazine. You are also gaining access to the Girls’ Angle mentors.  We urge all subscribers and members to write us with your math questions or anything else in the Bulletin or having to do with mathematics in general. We will respond. We want you to get active and do mathematics. Parts of the Bulletin are written to induce you to wonder and respond with more questions. Don’t let those questions fade away and become forgotten. Send them to us!

Also, the Girls’ Angle Bulletin is a venue for students who wish to showcase their mathematical achievements that go above and beyond the curriculum. If you’re a student and have discovered something nifty in math, considering submitting it to the Bulletin.

We continue to encourage people to subscribe to our print version, so we have removed some content from the electronic version.  Subscriptions are a great way to support Girls’ Angle while getting something concrete back in return.  We hope you subscribe!