## SUMS

## Welcome!

Sydney University Maths Society (also known as ΣUMS or SUMS) is a club for students with an interest in any and all things maths-related.

We host a variety of events catered for every kind of maths enthusiast. We're known for holding fun and interesting talks on unusual areas of mathematics, as well as hosting cake bakes, maths relays, puzzle days, and trivia nights. But most importantly, at every event there's free pizza!

If you'd like to become a member of ΣUMS, simply fill out this form so that we can add you to our members and mailing list. We usually don't email more than once a week.

Feel free to email us with any questions, comments, or suggestions as well.

Be sure to check us out on Facebook to keep updated on all our upcoming events! You can also check our calendar below.

## Events

**Talks:** Our weekly mathematical talks are held on **Thursdays** at **1-2pm**, currently in **New Law 024**. These go for thirty to forty minutes and are concluded with a helping of pizza and drinks. Previous talk topics have ranged from the mathematics of sound design to solving *n*-dimensional Rubik's cubes, and have included titles such as "Hats, Buckets, and Pascal's Triangle" and "Is There a Zombicidal Maniac Nearby? You Better Hope So! (Statistically surviving a zombie apocalypse)".

**Mixer:** We hold a mixer in the first week of each semester so that new and old members alike can meet each other over pizza and games.

**Puzzles:** Arguably our biggest event is the **ΣUMS Puzzle Hunt**, which is held over one week sometime in second semester. Teams of up to five people compete online to solve 20 puzzles over 8 intense days, and the winners are awarded hundreds of dollars in prizes.
Last year's Puzzle Hunt was held over the week beginning Monday 2 November. Previous years' puzzles can be found by visiting the archive page.

**Maths Relay**: A competition where members form teams to see who can solve the most maths problems in a specified period of time. Prizes are awarded based on speed and number of correct guesses. These questions are written to be more fun and thought-provoking than outright difficult or formulaic.

**Cake Bake**: Once or twice a year we hold a cake-baking competition. Cakes are judged in a range of categories including "Best Tasting" and "Best Mathematical Reference", and awarded prizes. Then we eat them.

**Trivia Night / Letters & Numbers**: ΣUMS has on occasion hosted the trivia night at Manning Bar. On March 8 we will be holding a big Letters & Numbers competition at Manning from 5-6pm (joint event with CrossSoc and LingSoc).

## 2016 Calendar

*March 3*: Semester One Mixer

*March 8*: Letters & Numbers @ Manning (with LingSoc and CrossSoc) (5-6pm)

*March 10*:

**Tiling with Rectangles**- Sean Gardiner

*March 17*:

**How I learned to stop worrying and love floating point numbers**- Mark Greenaway

*March 22*: GM: Election of First-Year Representative and General Executive

*March 22*: LaTeX Workshop (1:30-2:30 Carslaw 610-611)

*March 24*:

**Calculating the date of Easter**- David Gruenewald

*April 5*: Breaking Barriers Webinar &

**Panel Discussion**(with SUWIE) - Nalini Joshi, Kate Jolliffe, and Julie Cairney (10-1:30 Women's College)

*April 7*:

**The Base 12 Counting System: A Superior Alternative to the Decimal System**- Andy Tran

*April 14*: Maths Relay (winners: Team-Star)

*April 20*: Letters & Numbers @ ISL (with LingSoc and CrossSoc) (5-6pm)

*April 21*:

**The Sound of Science: Describing Sounds Using Mathematics**- Joachim Worthington

*April 28*:

**Introduction to Julia Sets and Their Dynamics**- David Long

*May 5*: Puzzles & Games Day

*May 12*:

**Lightning Talks**:

**Super Dense Coding**- Alex Babidge

**Guarding Galleries**- Sean Gardiner

**Arithmetic in Base -1+i**- Kevin Liang

*May 16*: Cake Bake (12:30-1:30 Carslaw kitchen)

*May 19*: GM 2 and

**Lightning talks**:

**Australia's next top statistical model V2.0**- Kevin Wang

**Deterministic Chaos!?**- Longen Lan

**Friday the 13th**- David Gruenewald

*May 19*: Industry Talk - Optiver (New Law 342, 6-8pm)

*May 26*: Maths Relay (winners: Team Radman)

*June 2*:

**Mathematics and Healthy Hearts**- Mary Myerscough

## 2015 Calendar

*March 5*: Semester One Mixer

*March 12*:

**The Mathematics of SET**- Sean Gardiner

*March 17*: Post-Pi Day Cake Bake

*March 19*:

**Women in Maths and Maths in the World**- Nalini Joshi, with Caity McGregor, Claire Edmunds, and Maggie Corrigan

*March 26*:

**Counterfeit Coin Conundrums**- Gareth White

*April 2*:

**Work Like an Egyptian**- Leon Poladian

*April 2*: Post-WCC social cricket match

*April 14*: Letters & Numbers (Mostly Numbers) competition #1

*April 16*:

**Consequences of a Combinatorial Theorem**- Gerry Myerson (Macquarie)

*April 23*:

**Scissors Congruence and Hilbert's 3rd Problem**- Stephan Tillmann

*April 28*: GM: Election of First-Year Representative; mini Letters & Numbers Competition

*April 30*:

**Solving Rubik's Cubes**mini-talk + cubing competition

*May 7*: Maths Relay (winners: The Butterfly Catchers Society)

*May 14*:

**Diophantine Analysis and Transcendental Numbers**- David Lee

*May 21*:

**Multiscale, multidisciplinary and multi-method: How (mathematical) honey bees find a home**- Mary Myerscough

*May 28*: Lightning Talks:

**Hailstone Numbers**- Josh Ciappara

**Non-linear Chemical Dynamics**- Maggie Corrigan

**Rational Tangles**- Sean Gardiner

**Australia's Next Top Statistical Model**- Kevin Wang

*June 4*: Puzzles & Games Day

*June 11/12*: ΣUMS Stuvac study sessions

*July 30*: Semester Two Mixer

*August 5*: Letters & Numbers @ Manning with LingSoc and CrossSoc (winners: Numb Bears)

*August 6*:

**How to win (variants of) Tic-Tac-Toe**- Sean Gardiner

*August 7*: ΣUMS Problem Competition closes

*August 11*: Ashes-commiseration social cricket match

*August 13*:

**Differential equations with trees**- Chris Ryba

*August 20*:

**Australia won the Ashes, statistically**- Kevin Wang

*August 27*: Maths Relay (winners: The Perfect Storm)

*September 1*:

__Synthetic Biology: Now Statistically Significant__- iGEM industry talk

*September 3*: Lightning Talks:

**Tau: The Superior Alternative to Pi**- Andy Tran

**Infinite Infinities**- Jonathan Zheng (Cambridge)

**Good Sort Bad Sort**- Rachel Wong (Cambridge)

**Light and Geometry**- Vaishnavi Calisa

*September 10*:

**Modal Logic: Formalising the Necessary and Possible**- Caity McGregor

*September 17*:

**Möbius, Klein and Real Projective Space**- Ross Ogilvie

*September 17*:

__Quantitative Careers: Trading on the Sports Betting Market__- Priomha Group careers talk

*September 24*: Puzzles & Games Day

*October 8*:

**Breaking (badly constructed) 1024-bit RSA**- Yinan Zhang

*October 15*:

**When applied mathematics collided with algebra**- Nalini Joshi

*October 22*: ΣUMS Annual General Meeting

*October 29*: Letters & Numbers with LingSoc and CrossSoc #2 (winner: Power of One)

*October 30*: End of semester drinks

*November 2*: ΣUMS Puzzle Hunt 2015 begins!

*November 5/6*: ΣUMS Stuvac study sessions

## 2014 Calendar

*March 6*: Semester One Mixer

*March 13*:

**Shadowboxing: Lengths, Areas, and Projections**- Ivan Guo

*March 20*:

**Game Theory and Nimbers**- Sean Gardiner

*March 27*:

**Curvature: from Euclid to Einstein**- Tim Large (Cambridge)

*April 3*:

**Everyone Hates Vector Calculus**- David Vasak (Cambridge)

*April 9*: Trivia Night

*April 10*:

**Puzzling the 120-Cell**- Saul Schleimer (Warwick)

*April 17*: Maths Relay (winners: Team Hyperspace-Blaster)

*May 1*:

**Triangles and Musical Chords**- Rob Tang (Warwick)

*May 8*: Puzzles & Games Day

*May 15*:

**Solving and Writing Puzzles**- Sean Gardiner

*May 22*: Lightning Talks:

**Islanders' Eye Colours**- Merlin Ge

**Knot Knitting**- Kitty Chang

**Mafiamatics**- Sean Gardiner

**The Soap Opera Problem**- Kevin Wang

**Why Pi is not 22/7 and Other Facts**- Leon Poladian

*May 29*:

**Algorhythms**- Joachim Worthington

*June 5*: Cake Bake (winner: Venn diagram cake)

*July 31*: Semester Two Mixer

*August 7*:

**Circle Packing**- Sean Gardiner

*August 14*:

**Programming with Fractions**- Kevin Liang

*August 21*:

**Gauss, the Heptadecagon, and the Freemasons**- Leon Poladian

*August 28*: Puzzles & Games Day

*September 4*: Maths Relay (winners: The Butterfly Rescue Club)

*September 11*:

**Three Angles on Tropical Geometry**- Stephan Tillmann

*September 18*:

**What Mathematics Do We See in Artwork?**- Clio Cresswell

*September 25*:

**Minding Your P's and Q's: Adventures in Statistical Inference**- John Wormell

*October 9*:

**Rubik's Cube and Related Puzzles**- Leanne Rylands (Western Sydney)

*October 16*:

**An Overview of Magic Squares**- David Gruenewald

*October 23*: ΣUMS Annual General Meeting

*October 27*: ΣUMS Puzzle Hunt 2014 commences!

*October 30*: Lightning Talks

## 2016 Committee

President | Sean Gardiner |

Vice-President | Kevin Wang |

Secretary | Andy Tran |

Treasurer | Kevin Qu |

Social Coordinators | Longen Lan & Radman Zhang |

IT Officer | Kevin Liang |

Women's Officers | Maggie Corrigan, Sarah Romanes & Jennifer Wakulicz |

First-Year Representative | Shane Arora |

General Executive | Alex Babidge, Terry Shang, Arthur Thiele & Edric Wang |