"On two occasions I have been asked [by members of Parliament], 'Pray, Mr. Babbage, if you put into the machine wrong figures, will the right answers come out?' I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." —Charles Babbage

'A world from a sheet of paper' - SMRI's #InternationalDayOfMathematics public lecture by Tadashi Tokieda will be on Fri 13 March Starting from a sheet of paper, explore magic tricks and geometry in this lecture filled with table-top demonstrations 🔗 events.humanitix.com/internationa... #MathSky🧮

Celebrating International Day of Women & Girls in Science by sharing this NSW State Library collection of interviews with some incredible Australian women in science, incl Nalini Joshi, Belinda Medlyn, the late Emma Johnston, Veena Sahajwalla & Lesley Hughes. collection.sl.nsw.gov.au/search?subje...

It’s mind-blowing to read that “ACIP’s chair, told a podcast, “I don’t like established science,” adding that ‘science is what I observe.’” The Economist (Asia Pacific) 07 Feb 2026 [The ACIP is Advisory Committee on Immunisation Practices]

Nothing is yours. It is to use. It is to share. If you will not share it, you cannot use it.

Free archive copy: archive.md/2026.02.09-0...

The inimitable @drmel.bsky.social takes a star turn in the Sydney Morning Herald www.smh.com.au/business/wor...

Matinée d'hommage à Michèle Audin : mathématicienne, historienne, écrivaine et femme engagée Le 14/03 à l'Institut Henri Poincaré, organisée par Femmes et Mathématiques et la SMF Inscription gratuite obligatoire smf.emath.fr/node/3690018 Venez nombreuses et nombreux, et partagez !

The applications to the Sydney Mathematical Research Institute (SMRI @sydmathinst.bsky.social) International Visitor Program close ⏰ 11:59pm (Sydney time) Feb 17. Apply to visit, and do research at SMRI and institutions across Australia! mathematical-research-institute.sydney.edu.au/internationa...

The extraordinary internationally renowned mathematical physicist Francesco Calogero passed away on 31 January 2026. He accepted the 1995 Nobel Peace Prize on behalf of Pugwash and was influential in many directions, e.g., the Calogero-Moser systems 👉🏼 en.wikipedia.org/wiki/Frances...

I just discovered happy numbers and I’m happy because they’re not what I expected… Hint: take the square of each digit and add. Do the same to the result and keep going. If the end is 1, then it’s happy 😃

“Professor John Cannon AO FAA has been recognised as an Officer of the Order of Australia (AO) for distinguished service to tertiary education, to mathematical computation, to cryptography, and to the development of algebraic software systems.” #mathsky 🎊 👉🏼 www.science.org.au/news-and-eve...

WOOHOO! Our sandwiches paper has been published! 🥳 ...in celebration, I'm going to claim that tonight's lasagna was a sandwich. 🥪

This is the most astonishing graph of what the Trump regime has done to US science. They have destroyed the federal science workforce across the board. The negative impacts on Americans will be felt for generations, and the US might never be the same again. www.nature.com/immersive/d4...

I read “Triangle inequalities” as “tranquilizers” this morning 🤔 Hmm 🧐 the universe is telling me something…

Planetary Alignment xkcd.com/3192/

Everything is linear In its own way Cuz if you zoom in close enough The curviness almost goes away

The 13yo is disappointed with me because I said that Millie Bobby Brown is 1/1000 of a Bobby Brown.

BIG FIGHT AT POLAND’S WROCLAW ZOO!!!

The Nesin Mathematics Village in western Turkey was dreamed up by award-winning mathematician Ali Nesin to engage his students

A New Year present from @MaríaMartínezOrdaz to all of us! a calendar illustrated with Women Logicians! This is lovely! María!

‘Cancel’ comes from a Latin word meaning “to make like a lattice.” When people needed to annul or void a document, they sometimes would mark it with crosshatches XXXXX which resembled a lattice. So the document became ‘canceled.’ ...we hope this post doesn’t get us that.

Almost a decade ago Emma Johnston, Tanya Monro and I appeared at The National Press Club of Australia to talk about our stories and our views of issues that impact on Women in Science. It was an amazing experience… I will miss you Emma. theconversation.com/if-we-really...

Devastating news that marine biologist, science communicator, and UniMelb VC Professor Emma Johnston has died after a short illness. She really was an extraordinary and visionary leader, and I have no doubt she would have made a fine Chief Scientist one day. theconversation.com/emma-johnsto...

I was searching for the arXiv reference for my recent preprint with 2 collaborators but the first hit was an AI synopsis of us as researchers 😂

a lot of people are aware that you can factor 2025 = 45² i'm honored to announce the factorization 2026 = (45-i)(45+i)

Do you know the trigonometric notations of Charles Dogson (aka Lewis Carroll)?

Have you seen the gut-wrenching story “Confronting university harassment: ‘You’re dumb, but you’re a pretty girl’” in thesaturdaypaper.com.au · December 13, 2025?

🥸😆🤣

Very sad that I felt I had no choice but to resign from The Infinite Monkey Cage - a victory for the transphobes and other bigots - I did it because so much of the media has chosen to believe the kind and empathetic people are a fiction - they are real and so often unrepresented.

The mathematical art exhibit at this week’s AustMS also featured stunning works by @mathskath.bsky.social which she has modestly omitted in her posts about it. Behold ⤵️

The next round of our International Visitor Program is now open! Math researchers from overseas, apply now to spend 4+ weeks working with new and existing collaborators here 🦘🌏 Aus researchers, please share: mathematical-research-institute.sydney.edu.au/internationa... Due: 17 Feb 2026 #mathsky

Brazil, where hearts were entertaining June We stood beneath an amber moon And softly murmured "someday soon."

The 2025 AustMS great debate is on “AI will definitely destroy mathematics” 😁

🚨 #CentresOfExcellence #CE26 announcement: ❗️Outcomes announced publicly for ARC Centres of Excellence 2026❗️ See ARC's RMS for list ➡️ https://rms.arc.gov.au/RMS/Report/Download/Report/a3f6be6e-33f7-4fb5-98a6-7526aaa184cf/288 /bot

Very sad to learn that Anne Husebekk has passed away. I had the deep pleasure of talking to Anne at the International Science Council meeting in Oman in January. Her discoveries in immunology were astonishing and she was so lovely to talk to, so generous and so wise … council.science/profile/huse...

Can’t wait to hear who wins the FIFA Fields medal 🏅in #mathematics

Do you use Google Scholar? Yes? Then read this and beware ➡️ “Even successful, widely-used academic infrastructure gets the axe when companies decide it's not strategically important anymore.” hannahshelley.neocities.org/blog/2025_08... from @hannahshelley.site via @olivia.science

The Journal of Mathematics and the Arts invites applications for Editor-in-Chief from scholars who understand that mathematics and art are not separate worlds. Help us showcase research that reveals the mathematical soul of creativity. spr.ly/63321AhlWd

A hundred discrete Painlevé equations ;) Hundreds of Reflection Groups A Hundred Topics in Algebra The Rising Sea with a Hundred Boats 🛶 Hundreds of Ordinary Differential Equations …

Welcome to Australia, where summer *does* start in 🌞 December …

What I forgot to say was that this is visceral; I am literally surrounded by very tall people and have to remember to look down every now and then …

Hmm… definitely at my froggiest 🐸 mode craning my neck awkwardly at stork-like birds 🦢 this week #frogsandbirds www.ams.org/notices/2009...

Great culture can save lives. Literally. Amazing letter in today’s @thetimes.com about Tom Stoppard

Life as we know it xkcd.com/3175/

A friend sent me a scary quote from ‘What we can know’ by Ian McEwan. It’s set in 2119 with an academic researching aspects of the past, i.e., our present era. /1

We need more words… there are an awful lot of ideas called “entropy” ⤵️ ncatlab.org/nlab/show/entropy

This is Morris Birkbeck Pell (on left), the first ever Professor of Mathematics and Natural Philosophy @sydney.edu.au

Needless to say, I don’t meet these criteria 😁 (♂ ↦ ♀, Cambridge ↦ Princeton…)

When @Sydney_Uni sought to appoint its very first professors, the then Provost wrote to the selection committee in England… /1