Blog.CarlRobitaille.org

Indiscriminate laziness

I was a bit surprised that you can post a Pringle through a letterbox

Posted on 2022/02/21 by Carl Robitaille

I was a bit surprised that you can post a Pringle through a letterbox-

because twisting straight lines trace out the hyperbolic paraboloid Pringle shape pic.twitter.com/dzhXQaAspn
— Matt Henderson (@matthen2) February 20, 2022

In 1957, John Conway built a water computer called WINNIE (Water Initiated Numerical Number Integrating Engine)

Posted on 2022/02/21 by Carl Robitaille

In 1957, John Conway built a water computer called WINNIE (Water Initiated Numerical Number Integrating Engine) pic.twitter.com/k8iVPdo0dY
— Fermat's Library (@fermatslibrary) February 20, 2022

“Everyone who confuses correlation with causation eventually ends up dead.”

Posted on 2022/02/21 by Carl Robitaille

"Everyone who confuses correlation with causation eventually ends up dead."

Favorite new way to teach this, hands down.
— Emily Rauscher (@rauscher_emily) February 18, 2022

Another nice way to visualize complex functions: “x-ray plots”

Posted on 2022/02/21 by Carl Robitaille

Another nice way to visualize complex functions: "x-ray plots". Below a plot of Riemann zeta from https://t.co/qvVdZKvwvB. Here is the Python script to draw all x-rays in Fungrim: https://t.co/p8q2WD00xP (I stole this technique from Juan Arias de Reyna's https://t.co/tYwUlnrWbp) pic.twitter.com/JU2U8skEp7
— Fredrik Johansson (@hypergeometer) February 19, 2022

Happy Valentine’s Day!

Posted on 2022/02/21 by Carl Robitaille

Happy Valentine's Day! pic.twitter.com/B5svmIRs6M
— Jay Cummings (@LongFormMath) February 14, 2022

There is always a prime between N and 2N

Posted on 2022/02/21 by Carl Robitaille

There is always a prime between N and 2N
— Fermat's Library (@fermatslibrary) February 19, 2022

Spherical Involute

Posted on 2022/02/21 by Carl Robitaille

Spherical Involute pic.twitter.com/P5qKhVmKMj
— たいすーらせん (@Yugemaku) February 18, 2022

Research real-talk Cliff Jumping

Posted on 2022/02/21 by Carl Robitaille

Research real-talk #cliffjumping pic.twitter.com/LyZsxJSoXG
— The Fields Institute (@FieldsInstitute) February 18, 2022

If a matrix is positive definite, all its principal submatricies are positive definite.

Posted on 2022/02/21 by Carl Robitaille

If a matrix is positive definite, all its principal submatricies are positive definite.
— Algebra Etc. (@AlgebraFact) February 17, 2022

“Young man, in mathematics you don’t understand things. You just get used to them.” – John Von Neumann

Posted on 2022/02/21 by Carl Robitaille

"Young man, in mathematics you don't understand things. You just get used to them." – John Von Neumann pic.twitter.com/tw0VwteJwS
— Fermat's Library (@fermatslibrary) February 17, 2022