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Updated: 2018-Jul-18 13:52 UTC. Listed tweets: 20. Based on tweets of Mathematicians on Twitter. Feedback: @TrueSciPhi.

Links in tweets originated by mathematicians in the past 14 days, ordered by retweets-per-follower averaged over each tweet of the link. Below, each link is presented in the context of the particular tweet with the highest retweets per follower.

1. One retweet per 8 followers (average):

Here they are, folks: all the "algebraic numbers". That is, complex numbers that are roots of polynomials with integer coefficients. The big ones are solutions of simpler equations: zero is gigantic. They're color-coded as explained here: https://t.co/TiYGgd9uiO pic.twitter.com/oJwSlMUPy8

— John Carlos Baez (@johncarlosbaez) July 7, 2018

2. One retweet per 39 followers (average):

This is real, and incredibly dangerous. The Russians ran their first major tryout of cyber warfare to try to shut down Estonia TEN YEARS AGO. It took the Estonians several days to recover, and is why this tiny nation now has awesome cyber defenses https://t.co/4C4hplSUo5 https://t.co/hj53UWiAQF

— Keith Devlin (@profkeithdevlin) July 15, 2018

3. One retweet per 44 followers (average):

Juego de Diagramas de Voronoi #MathGames https://t.co/gfroTj920b

— Juan Miguel Ribera (@juanripu) July 15, 2018

Estoy seguro que @ClaraGrima , @juliomulero y muchos otros pasarán un rato entretenido jugando pic.twitter.com/mID70LrbrG

4. One retweet per 64 followers (average):

Richard #Feynman's Integral Trick. (Neat bit of integration. If an integral is hard but depends on a parameter t, try differentiating it with respect to t to see if it could help solve it.) https://t.co/v93YbVKQYy

— Sam Walters ☕️ (@SamuelGWalters) July 17, 2018

5. One retweet per 77 followers (average):

The method of Lagrange multipliers isn’t just for calculus problems; it also works for calculus-of-variations problems! https://t.co/8ZboYKezk8

— James Propp (@JimPropp) July 7, 2018

6. One retweet per 82 followers (average):

I'm posting videos for learning/teaching multivariable calculus on YouTube in August 2018...

— robert ghrist (@robertghrist) July 5, 2018

Here's a trailer: https://t.co/TOvztiR2OK

7. One retweet per 83 followers (average):

Amazing how much fun can be had with random points on a sphere! A team of mathematicians on Twitter just discovered a cool connection between Catalan numbers and the distance between random points on the sphere in 4d - using the quaternions!https://t.co/g40n7DWAK1

— John Carlos Baez (@johncarlosbaez) July 11, 2018

8. One retweet per 104 followers (average):

Is it pointless to do highly abstract math like category theory? What purpose does it truly serve for mathematics? by John Baez https://t.co/l06Z3EgkY0

— John Carlos Baez (@johncarlosbaez) July 4, 2018

9. One retweet per 117 followers (average):

A five day workshop focused on women in academic leadership will take place @umanitoba in October. https://t.co/g7V3MIaS1O

— James Colliander (@colliand) July 11, 2018

10. One retweet per 123 followers (average):

Three kids from Texas made a boardgame about gerrymandering and here is its Kickstarter https://t.co/uatgYmCazR

— Jordan Ellenberg (@JSEllenberg) July 10, 2018

11. One retweet per 123 followers (average):

Enriched profunctors sound scary, but here's a nice one. Two islands C and D with one-way toll roads between some cities - and one-way plane trips from some cities in C to some in D. What's the cheapest trip from E to c? I explain the theory here: https://t.co/a3IYJ0sgrO pic.twitter.com/YtYwsoF9je

— John Carlos Baez (@johncarlosbaez) July 14, 2018

12. One retweet per 126 followers (average):

Entrevistra a LA mestra de mestreshttps://t.co/TIfRdni9de

— Daniel Ruiz Aguilera (@druizaguilera) July 15, 2018

13. One retweet per 146 followers (average):

This is the free modular lattice on 3 generators, where "modular" means A∨(B∧C)=(A∨B)∧(A∨C) when A<B or A<C. The free modular lattice on 4 generators is infinite! This one is connected to representations of the D4 quiver, but big mysteries remain: https://t.co/2PVLAWNpc4 pic.twitter.com/lRCQuyhLDp

— John Carlos Baez (@johncarlosbaez) July 14, 2018

14. One retweet per 186 followers (average):

I'm studying the math of piss! You use the urea cycle to convert poisonous ammonia into urea. This cycle is described by differential equations that turn out to have 7 "emergent" conserved quantities. Some of these prevent the waste of energy: https://t.co/l3LM1B0iqw pic.twitter.com/zTGyzxEojr

— John Carlos Baez (@johncarlosbaez) July 5, 2018

15. One retweet per 189 followers (average):

#Efeméride La matemática Valentina Mikhailovna Borok (1931-2004) nació un 9 de julio.

— Marta Macho Stadler (@MartaMachoS) July 9, 2018

Su especialidad era la teoría de ecuaciones en derivadas parciales.

Escribió más de 80 artículos en revistas... https://t.co/taYagFWMeI

16. One retweet per 190 followers (average):

Excuses at the Daily Nous: why I wasn't plagiarizing. https://t.co/9ZBbF4zgLu

— Joel David Hamkins (@JDHamkins) July 12, 2018

17. One retweet per 193 followers (average):

Understanding the history of mathematical diagrams, finally a systematic study! I will be excited to watch this develop: https://t.co/EnVK2HuPmu #mathart (historical)

— Edmund Harriss (@Gelada) July 11, 2018

18. One retweet per 196 followers (average):

Para jugar en verano: ¿Quién es ella?, una preciosa propuesta de Los Gatos con Batas https://t.co/6y4qRAoSwe

— Marta Macho Stadler (@MartaMachoS) July 13, 2018

19. One retweet per 222 followers (average):

patterns of birds https://t.co/FNsvzFBUgJ (beautiful pictures) pic.twitter.com/MEZxiilfQw

— Arthur Charpentier 🌼 (@freakonometrics) July 16, 2018

20. One retweet per 224 followers (average):

"Simone Veil a interdit le chronométrage de la toilette des bébés pour les auxiliaires puéricultrices, qui étaient notées sur ce critère. (...) aujourd’hui, c’est le temps de toilette des personnes âgées qu’on chronomètre dans les Ehpad" https://t.co/lksq1tTLuQ

— Arthur Charpentier 🌼 (@freakonometrics) July 8, 2018