A rope swinging from the bottom of a cardioid traces out another cardioid Posted on 2021/06/07 by Carl Reply a rope swinging from the bottom of a cardioid traces out another cardioid. (its involute is another cardioid.) pic.twitter.com/UnS25gIrgx— Matt Henderson (@matthen2) May 29, 2021

Discrete Conformal Equivalence of Polyhedral Surfaces Posted on 2021/06/07 by Carl Reply Discrete Conformal Equivalence of Polyhedral Surfaces Excited to share a new #SIGGRAPH2021 paper with @markgillesie81 and Boris Springborn that is a pretty big breakthrough in mesh parameterization: https://t.co/M0EZGuIGfLIn short: no matter how awful your mesh is, we compute beautiful high-quality texture coordinates.(1/n) pic.twitter.com/XJ8j41RkZg— Keenan Crane (@keenanisalive) May 25, 2021

Math and Sleuthing Help to Explain Epidemics of the Past Posted on 2021/06/07 by Carl Reply Math and Sleuthing Help to Explain Epidemics of the Past Data science meets sleuthing: Terrific story about work by applied mathematician David Earn and colleagues, looking back at the Great Plague of London in 1665 and the invasion of the Black Death in the 1300s. Earn and team found clever ways to chart these long-ago epidemics. https://t.co/WWs7c1kf8y— Steven Strogatz (@stevenstrogatz) May 21, 2021

In 2D electrostatics, the saddles of the electric potential from 3 equal point charges are the foci of the biggest ellipse contained in the triangle of the charges Posted on 2021/06/07 by Carl Reply Guess what? In 2D electrostatics, the saddles of the electric potential from 3 equal point charges are the foci of the biggest ellipse contained in the triangle of the charges. pic.twitter.com/f9SYYm3SLH— Albert Chern (@theAlbertChern) May 20, 2021

Caroline of Ansbach Posted on 2021/06/07 by Carl Reply Caroline of Anspach! Studied with Leibniz, became Princess of Wales, facilitated the Leibniz-Clarke correspondence on the nature of space, and was an early advocate of immunization, after overseeing medical trials. All before becoming Queen of England.https://t.co/FThlqLaoGk— Sean Carroll (@seanmcarroll) May 19, 2021

Responses of a nonlinearly stratified fluid to vertical harmonic forcing Posted on 2021/06/07 by Carl Reply Published today @JFluidMech: the responses of a nonlinearly stratified fluid to vertical harmonic forcing. Includes stunning wave breaking and a simple method for understanding triadic resonances https://t.co/TPuwLB0BxW TY: @ASUMathematics @ASUHPC @ASUResearch pic.twitter.com/2QiW01ZthC— Jason Yalim (@jsonyaml) May 18, 2021

3D printed hinged icosidodecahedron Posted on 2021/06/07 by Carl Reply 3D printed hinged icosidodecahedron. The hinges are a thin layer of printed PETG. I use a slightly different method than @HCO28970306 pic.twitter.com/rWLZQMIiUO— Gerard Westendorp (@GerardWesty31) May 17, 2021

Which unfoldings of the hypercube tile 3-space: How to check for isometric space-fillers? Posted on 2021/06/07 by Carl Reply We’re done! Solid submissions are in for all 261 cases and verifiers are working through the backlog.AND Moritz Firsching has now written code showing all 261 unfoldings do definitely tile space. https://t.co/rOFsOCqJakSo this project has proven the result twice over!— Matt Parker (@standupmaths) May 15, 2021

How Eugenics Shaped Statistics Posted on 2021/06/07 by Carl Reply How Eugenics Shaped Statistics Looks like decolonization has found its way to statistics: https://t.co/TWOD0ITNeTYou may never again look at a Chi-Square statistic the same way as you did before. 🙂@HousingTheCity @red_abebe @stevenstrogatz @DrDoddie @danbherman @GizemKaraali_ @OlufemiOTaiwo— Michael A. Lewis (@MichaelALewis10) May 12, 2021