| Tweet Follow @TrueSciPhi |
1. One retweet per 33 followers:
{\__/}
— Mark C. (@LargeCardinal) September 11, 2019
( • . •)
/ >💻 yes, I can tell you much about cybersecurity
{\__/}
( • - •)
💻< \ wait, you want to do what to your ex's facebook? https://t.co/ZvBGyP6iCP
The Thurston geometry not tweeted yet... Life on (not in) a spherinder. In this geometry, a small brick, when watched from a specific location, will look like a huge ring around you... more precisely, not one ring, but a series of concentric rings!https://t.co/r745yLpHhD pic.twitter.com/PhBeVi5uSK
— Zeno Rogue (@ZenoRogue) September 10, 2019
Gripping gears: two gears mesh with and rotate around each other, with no axles and no frame. Joint work with @willsegerman and @Sabetta_. Full video at https://t.co/YRbcjmfl2b pic.twitter.com/h8d6HQYHj1
— Henry Segerman (@henryseg) September 14, 2019
New tenure-track position open for asst prof in math at @harveymudd -- about one more month before the committee starts reading applications! Please pass the word! https://t.co/Djxwtz6Qok (open field, priority for #datasci)
— Darryl Yong (@dyong) September 11, 2019
In the static regime, the electric / magnetic fields generated by point sources is the superposition of radial monopoles / dipoles. https://t.co/P427gY1dQE pic.twitter.com/GCnqyvZPhH
— Gabriel Peyré (@gabrielpeyre) September 10, 2019
A short thread on jobs advertised in the Faculty of Science @durham_uni where I will be starting as Executive Dean in January. Come join me!
— Jacqui Ramagge (@jacquiavelli) September 11, 2019
The Brachistochrone problem was solved by Bernoulli and is the birth of calculus of variations. https://t.co/FruykhAkmj https://t.co/TxykJLkQhl pic.twitter.com/g6FY6u6riZ
— Gabriel Peyré (@gabrielpeyre) September 14, 2019
Let me share some illustrations I've recently created to discuss the topic:
— Joel David Hamkins (@JDHamkins) September 10, 2019
What is a number?
Two sets are equinumerous—they have the
same cardinal size—when they can be placed into a one-to-one correspondence, like the shepherd counting his sheep off on his fingers. pic.twitter.com/qYtNqkx13I
20 years of @MitacsCanada : my article in the September 2019 Notices of the @amermathsoc recounts the story of the innovation platform launched by the Canadian mathematics community through their institutes: @CRM_Montreal @pimsmath @FieldsInstitute https://t.co/SO0iJ8w2HA pic.twitter.com/re398MC593
— Alejandro Adem (@alejandroadem) September 10, 2019
Domino Chain Reaction
— Tamás Görbe (@TamasGorbe) September 14, 2019
A domino can knock over a bigger/scaled-up version of itself. The maximum scaling factor is around 2.
Start with a domino of height 5 cm and use 1.5 for scaling-up. How many dominoes do we need to reach a height of 100 meters?
Source: Stephen Morris pic.twitter.com/NBhyfKBFDn
El #HypnoMaths se nos ha ido de las manos...#AugmentedReality #MathLife #MathTeacher https://t.co/3P6nRAqNpa
— Juan Miguel Ribera (@juanripu) September 13, 2019
Principal component analysis and non-negative matrix factorization are two particular cases of non-convex matrix factorization problems. They differ by the constraints on the atoms D and coefficients X. https://t.co/TAWN786Qq0 https://t.co/knuRHQNlNG pic.twitter.com/f7AvXgIozA
— Gabriel Peyré (@gabrielpeyre) September 16, 2019
Limit that I stumbled into in some calculations. (Where big Gamma here is the classical Gamma function.) #math #calculus pic.twitter.com/E1ja9qe9Ap
— Sam Walters ☕️ (@SamuelGWalters) September 13, 2019
HyperRogue 11.2: Thurston geometries (free update!)https://t.co/uaNQ5MgmiC pic.twitter.com/TpWSBZkaVa
— Zeno Rogue (@ZenoRogue) September 13, 2019
Tip 1 if you're applying for a #postdoc (or any job!)
— Paul Macklin (@MathCancer) September 9, 2019
A generic cover letter doesn't help much. Don't tell me you want a job. Show me why you want *this* job.
What interests you about *this job*? Do you understand what we do? How will you contribute? How I can help you grow?
Simple example showing how the tensor product is the natural extension of the Cartesian product A x B for sets to vector spaces of functions. Here, it is illustrated for finite sets, though it can be appropriately extended to general locally compact spaces. #algebra #math pic.twitter.com/PBPliDsoKF
— Sam Walters ☕️ (@SamuelGWalters) September 14, 2019
The @ICERM exhibits for Illustrating Mathematics are starting to appear! pic.twitter.com/nuPSYJLpmU
— Laura Taalman (@mathgrrl) September 9, 2019
Inside every dull gray cube there's a colorful dodecahedron yearning to unfold!
— John Carlos Baez (@johncarlosbaez) September 15, 2019
The dodecahedron doesn't fill the whole cube. Only about 80.9%. But that's the golden ratio (sqrt(5)+1)/2 divided by 2, so we shouldn't complain.
Animation by Hermann Serras. (1/2) pic.twitter.com/aiqO80OuVI
When I spotted @kimjoyskitchen recipe @guardian for mango tart with geometric fruit pieces, the mathematician in me couldn’t resist doing my own symmetrical version pic.twitter.com/sLtPiMjOt7
— Marcus du Sautoy (@MarcusduSautoy) September 14, 2019
The barista at my neighborhood coffee shop just told me he thinks math is the “humanities of the sciences.”
— Kelsey Houston-Edwards (@KelseyAHE) September 15, 2019