http://chrisvantienhoven.nl/mathematics/encyclopedia-of-poly-geometry

Didn’t know this had been. Looks interesting!!

@zoec and bc of age (with COBOL), they both are perforated languages

I made a guest post at the n-Category Café, thanks to a kind invitation by John Baez! The plan is for it to be the first of a series:

https://golem.ph.utexas.edu/category/2019/02/sporadic_sics_and_exceptional.html

math thoughts Show more

Create a culture of respect for data. Nice opinion paper about #ethics in #statistics. #OpenScience #OpenData #science

📄Gelman, A. 2018. Ethics in statistical practice and communication: Five recommendations. Significance 15:40-43

🔗https://rss.onlinelibrary.wiley.com/doi/10.1111/j.1740-9713.2018.01193.x

Had some paint left over this morning so did another little nebula, then this around it :D

On 220gm watercolour paper measuring 148x210mm. If you want to adopt it, $25 USD which includes worldwide postage, for the signed original :)

@codewytch

I like Zeno's paradox because it could have gone either of two ways. Either you invent calculus and oh hey we can add infinite numbers of infinitely tiny things, or you invent the theory of atoms https://en.wikipedia.org/wiki/Atomism and end up with Minkowski's theorem https://en.wikipedia.org/wiki/Minkowski%27s_theorem thereby opening up algebraic geometry.

"Matching is easier than counting" -- one of my favourite gems in combinatorial proof: https://www.math.hmc.edu/~benjamin/papers/DIE.pdf [PDF]

"An alternative approach to alternating sums: a method to DIE for"

Here's a fun TIL: Because the ratio of terms in the Fibonacci sequence approaches phi, and because phi is close to the ratio of km to miles, you can approximate conversion between distances with adjacent Fibonacci numbers.

So 2 km ≈ 1 mile, 3 km ≈ 2 miles, 5 km ≈ 3 miles, 8 km ≈ 5 miles, 13 km ≈ 8 miles, etc, etc