# Latest News page updated 2019/11/27

* Note to the organisers - this page is auto-generated from Admin_RawTalkData *

# SATURDAY

## SESSION 1a : 14:15

### Colin and others : Welcome to MathsJam X!

Welcome, setting the scene, choosing judges, and generally getting underway

### Adam Townsend : Mathematical socks: A review

Maybe you also receive maths-themed socks for Christmas. In this walkthrough, I com-pair and rank the most popular maths for socks, and try to rev-heel who designs these in the first place... no mean feet.

### Belgin Seymenoglu : Math Blaster

Math Blaster is a classic mathsy game many of you will have played in your childhood. But did you know it was first released in 1983? And which version did you play? I'll show you the Sega Mega Drive version of the game in my talk, and give you my review. You can look forward to some 16-bit screenshots, too!

### Daniele Aurelio : The actual Library of Babel

In his 1941 short story "La biblioteca de Babel", Argentine author and librarian J. L. Borges envisioned a gigantic library containing any possible book. But this is just literary fiction, isn't it?

### Rachel Wright : A problem of (inadvertent) pattern making

A problem of (inadvertent) pattern making

### Adam Atkinson : Roman Mathematics

I will talk about Roman Mathematics. Not Ancient Rome, though.

### Geoff Morley : Neosemimagic Tilings

A generalisation of both semimagic squares and perfect squared squares brings new challenges.

### Laurence O'Toole : Predicting Groupthink - A Magic Trick

We will play a game where the audience literally holds all the cards. Some guests will be invited to make a few straightforward choices. And at the end, magic happens!

## SESSION 1b : 15:30

### Peter Rowlett : #tmwyk

Games, puzzles and fun ways my son and I have been playing with mathematics, pre-school and outside of the formal curriculum.

### Tony Mann : A curious magic square trick

I recently came across this interesting variation of the "I will construct a magic square for a given target sum" trick.

### Mark Fisher : Mersenne and Cole

One heroic lecture that filled in an almost inconsequential piece of maths

### Eva Lesny : How many are in a few?

How many are in a few and how much is a handful?

### David Mitchell : The Brothers Fibonacci; Etiam mingens mathematicae memini!

Shyness in the gents pointed Fibonacci to his celebrated discovery. Even greater shyness leads to a generalisation of his sequence and of the algebraically expressible Golden Ratio to which the ratio of successive numbers converges. (Thanks to Nottingham MathsJam attendees for illuminating observations)

### Claire Cohen : Exploring shapes with Curvahedra

Some interesting topology and shapes made with Curvahedra.

### Alaric Stephen : Rational Origami

Starting with a unit square of paper, how can we fold it to divide a side into a ratio of 1:2? How about 3:4? In this talk we will explore a method for producing any rational ratio using a minimal number of folds.

### James Grime : S.O.X.

One of my favourite mathematical books

## SESSION 1c 16:35

### Tom Button : Is the mathematical mind flat?

Do we solve mathematical problems subconsciously or is this just a myth?

### Sam Hartburn : (Not) Squaring the Circle

It's well known that it's not possible to square the circle using ruler and compass. It is, however, possible to square some other shapes.

### Alexander Bolton : Factor Graphs and Unsupervised Joke Generation

I will introduce the concept of factor graphs and describe an application of them to joke generation.

### Jonathan Welton : Domino Knights and Patios

If chess pieces were domino sized, what move would the knight have? And what boards could it tour? And just what has this to do with garden design?

### Martin Chlond : The Travelling Salesman Problem: A couple of whimsical applications (Part 2)

Completion of last years talk.

### Alistair Bird : The Bottle Imp

We introduce the mathematical set-up to the Robert Louis Stevenson short story "The Bottle Imp" - and discuss how to behave before an apocalypse.

### Karen Hancock : How many ways to turn a corner?

Thoughts on the many variations of a sock heel.

### Yuen Ng : Moving on from Napier's bones...

A brief demo of some Genaille-Lucas rulers - does bigger always mean better?

## SESSION 1d : 17:45

### Katie Steckles : Monthly MathsJams

A quick review ...

### Rob Eastaway : Jardin's Principle

Why do we make things so complicated when we claim to want simplicity? The answer is that it's inevitable - and this phenomenon has a name.

### Hannah Gray : Escher in the Palace

A very brief introduction to Escher's work and the permanent exhibition in The Hague (my new home!).

### Gavan Fantom : What if numbers could have negative digits?

Imagine if individual digits within a number could be either positive or negative. Could you use small negative digits instead of large positive ones? Could you avoid learning your times tables past five? Join me for a brief introduction to a fascinating approach to arithmetic.

### Martin Whitworth : Sums of powers

I guess most Mathsjammers know the formula for sums of consecutive integers, and many may know the one for sums of squares, but what about higher powers? - and how is Pascal's triangle involved?

### Elaine Smith : Chinese Take-Away!

Discussion on 'Take-Away' techniques: 'borrowing and paying back'; milk-bottle method; decomposition; invisible number line. Why are Chinese Take-Aways easier?

### Various : Activity Elevator Pitches (two slots)

People who have offered to run activities on the Saturday evening can offer a brief description to help entice people.

# SUNDAY

## SESSION 2a : 09:00

### Colin Wright : 70 vs 100

We all know that if you're travelling faster it takes longer to stop, and we think we know the rules. But do we?

### Matthew Scroggs : Why and how I wrote a LaTeX package

I will tell the story of why and how I wrote a LaTeX package, and how we can use it to revolutionise the notation used for unit vectors.

### Pat Ashforth : Using maths without knowing it

Maths for the maths-phobic knitter

### Matt Peperell : An unexpected use for the fibonacci sequence

It's not just pentagons, pinecones, and snail shells

### Isabel Coelho : The Mirror Reversal Problem

I look in the mirror. My reflection looks back at me. When I wave my right hand, my image waves her left. When I wave my left hand, my image waves her right. Why do mirrors reversal left and right? And, if right becomes left and left becomes right, why does not top become bottom?

## SESSION 2b : 09:55

### Hugh Hunt : Nodes of vibration of a bending beam

With a beautiful - and musical - demo, and how this helps if you have a noisy washing machine

### Alison Eves : Florence Nightingale: the compassionate statistician

2020 is the bicentenary of Florence's birth: a great opportunity to celebrate her contribution to statistics, and their use in saving lives!

### Andrew Taylor : The "Belt Trick" Spinor

I saw a GIF of this lovely geometrical trick on Twitter and wanted to understand it, so I built my own version: https://www.shadertoy.com/view/3t2Xzy It turns out to be related to tricks you can do in real life by rotating a plate or a belt, which reset not after 360º but 720º. I want to show you what I found out and how the trick works, plus a couple of variants.

### Christian Lawson-Perfect : Baked Sudoku

To solve a Sudoku puzzle, bring to a simmer and then leave to cool.

### Miguel Gonçalves : From a new deck to Si Stebbins

How to prepare a Si Stebbins stack from a new deck order during a performance.

### Stefania Delprete : Why the music staff is not really mathematically correct?

Music, lovely music. Five lines, sometimes ten, and little circle on those lines or between two of them. Should we accept that the space between them is the same? Does it make sense? I rather say it doesn't, I rather create an alternative staff!

## SESSION 2c : 10:50

### Scott Elliott : Modulating secondary waves into screw threads

Deux Nuts is a tricky bolt with two captive nuts that mysteriously twist opposite directions on the same screw thread. How? Scott graphically illustrates the maths of its construction.

### Sydney Weaver : Permutations of the Cube

Discussing approaches to calculating the permutations of a rubik's cube and other twisty puzzles.

### Miles Gould : Quantum computing in perspective

In quantum computers, the state of a "qubit" (quantum bit) can be something in-between 0 and 1 - but in what sense "in-between"? They're not elements of the interval [0, 1], but it turns out that there is a natural geometry for the state space of qubits: *complex projective space*, closely related to the mathematics of perspective drawing.

### Zoe Griffiths : Two thousand and nineteen

Zoe performs a mathematical trick that she designed after reminiscing about key mathematical events of the year 2019.

### Luna Kirkby : Cursed Regular Expressions

We explore a curious relation between computer science and mathematics, and make regular expressions do things they *really* weren't meant for.

### Lucy Rycroft-Smith : Ten New Maths Jokes

Most maths jokes are terrible. It's time for some brand new ones...

## SESSION 2d : 11:45

### Various : Competition Results!

Announcement of competition results.

### Alison Kiddle : Adventures with Dodecahedra

Dodecahedra are pretty cool! In this talk, I will share some of my favourite dodecahedral things you can make and do.

### Tarim : Horseshoe Orbits

Why do the planets and moons in the solar system all spin in the same direction (mostly)? And what does this have to do with the stranger motions of two of the moons of Saturn?

### Louise Mabbs : Circling the Square & my Mathematical Magic progressions

How my Mathematical Magic colouring sequence has progressed from square based grids, to circular designs, through into cog based principals

### Gordon Hayes : How to Avoid a Hangover Using Maths

A little graph theory. This talk will probably give you a hangover instead of helping you avoid one. On the other hand, everyone loves a bit of graph theory!

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