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Showing posts from December, 2015

My first mathoverflow question

My first mathoverflow question

In the H^3 upper half space model, is a hemiellipsoid perpendicular to the plane at infinity a minimal surface?

Maybe I can get more than 1 reputation point now, and be able to upvote other answers :)
http://mathoverflow.net/questions/226524/in-the-mathbbh3-upper-half-space-model-is-a-hemiellipsoid-perpendicular-t

Zoetrope Sculptures

 Zoetrope Sculptures

These sculptures in motion are quite amazing to watch.  See also:
www.thisiscolossal.com/2015/01/fascinating-3d-printed-fibonacci-zoetrope-sculptures/

Found via decor light

Originally shared by Jenny Winder
http://www.thisiscolossal.com/2015/12/flux-a-mesmerizing-3d-printed-zoetrope-that-glows/

Excellent video about the relationships between various models of spherical, euclidean, and hyperbolic geometry.

Excellent video about the relationships between various models of spherical, euclidean, and hyperbolic geometry.

Originally shared by Henry Segerman

New video with Saul Schleimer: Illuminating hyperbolic geometry. Conformal projections FTW.
https://www.youtube.com/watch?v=eGEQ_UuQtYs

Check out these awesome mathematical t-shirts by Henry Segerman.

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Check out these awesome mathematical t-shirts by Henry Segerman.  The four I ordered last week showed up this morning, and they are great!  Perfect stocking stuffers! :D

Originally shared by Henry Segerman

I shifted my T-shirt store over to Neatoshop, very nice quality and they are very supportive of their artists.
http://www.neatoshop.com/artist/Henry-Segerman (including some designs with Roice Nelson)

This is incredible. Be sure to watch it more than once.

This is incredible. Be sure to watch it more than once.

Originally shared by Astronomy Picture of the Day (APoD)

Kepler Orrery IV
Video Credit & Copyright: Ethan Kruse (University of Washington)
http://apod.nasa.gov/apod/ap151205.html

The exoplanet hunting Kepler mission's total for candidate and confirmed multiple planet systems stands at 1,705 worlds in orbit around 685 distant stars. Put all of those exoplanet orbits on the same scale and follow their relative orbital motions to get Kepler Orrery IV. To make the planets visible, their sizes aren't shown to scale. But orbits of the planets in the Solar System (dashed lines) are included to scale in the hypnotic video. Of course, Kepler uses planetary transits to detect exoplanets, looking for a slight dimming of light as the planet crosses in front of its star. In the time compressed video, Kepler's multiplanet system orbits are all oriented to put observed transits at the three o'clock position. The dervish-like mo…

Coloring Adventure in Math

Coloring Adventure in Math

Looking for the perfect holiday gift for your mathematical or artistic friends?

Patterns of the Universe was released today.  It is the US version of a coloring book by Edmund Harriss and Alex Bellos.  I contributed one of the images and was able to get an early copy.  They really did a fantastic job with it! 

In Europe, it is titled Snowflake Seashell Star
http://www.amazon.co.uk/gp/product/1782117881/
http://www.amazon.com/gp/product/1615193235/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=1615193235&linkCode=as2&tag=gravit-20&linkId=UFGUDRWYADUSP6WF

David Austin illustrates how circle packings bring together some important ideas in geometry, topology, and...

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Originally shared by American Mathematical Society

David Austin illustrates how circle packings bring together some important ideas in geometry, topology, and analysis, and form a bridge between the discrete and continuous worlds in this month's Feature Column, "Petals, Flowers and Circle Packings." http://bit.ly/1O0PXRc