### David Ketcheson

Shared publicly -If you're not familiar, 13 upvotes is a huge number for MO.

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David Ketcheson

Works at King Abdullah University of Science & Technology

Attended University of Washington

Lives in Saudi Arabia

251 followers|169,259 views

AboutPostsPhotos+1's

I have only one word for this mathoverflow question and its 13 upvotes: Wow.

If you're not familiar, 13 upvotes is a huge number for MO.

If you're not familiar, 13 upvotes is a huge number for MO.

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Matthew Knepley

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+Ondřej Čertík The rational arithmetic quickly becomes completely umanagable. Its not even on the radar anymore. The arbitrary precision stuff is pretty nice, like MPFR, but its way more than 10x slower. The quad-double is <= 10x slower.

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As a rule, I don't discuss politics on the internet. But this has hurt too many of the people I love.

The linked article is an editorial by Desmond Tutu.

The linked article is an editorial by Desmond Tutu.

In The Wall Street Journal, Bishop Desmond Tutu writes that there should be no more hiding from Venezuela’s human-rights abuses.

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Know anyone who could help with this?

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I think in SMC you can click on a plot and you get a callback to your interact function...

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I rarely watch talks, but this was worthwhile. The speaker verbalizes some programming principles that I have been slowly learning over years of experience and errors.

"Rich Hickey emphasizes simplicity’s virtues over easiness’, showing that while many choose easiness they may end up with complexity, and the better way is to choose easiness along the simplicity path."

I should mention that I found this via Slant, which seems pretty useful too:

http://www.slant.co/?tag=development

"Rich Hickey emphasizes simplicity’s virtues over easiness’, showing that while many choose easiness they may end up with complexity, and the better way is to choose easiness along the simplicity path."

I should mention that I found this via Slant, which seems pretty useful too:

http://www.slant.co/?tag=development

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This was a well delivered talk. I am not sure it will change anything I do, but he is a good speaker.

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Do you have a Python project that produces plots? Would you like to be able to automatically test whether those plots are correct? Here's one way to do it.

How to use matplotlib's image_comparison decorator in your own project

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I'm excited to meet this guy next week. The video is impressive.

COUNTDOWN TO WEP 2015: Multiple world champion and world record holder Guillaume Néry will take you with him to the depths of the ocean as you discover the fascinating world of free diving: the act of diving as deep as possible on a single breath. http://goo.gl/nKUKtK

All KAUST community members are invited to attend his keynote lecture on Wednesday, Jan. 14 from 7:00pm to 8:30pm.

See YouTube freefalling video: http://goo.gl/OS2hH2

All KAUST community members are invited to attend his keynote lecture on Wednesday, Jan. 14 from 7:00pm to 8:30pm.

See YouTube freefalling video: http://goo.gl/OS2hH2

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Really impressive

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I'm training for a marathon and I use MapMyFitness (MMF) on my iPhone to track my mileage and pace for each workout. MMF has a public API and Jason Sanford has written a Python front end for it. Which means that I can easily get hold of all my data in Python and explore it with Pandas!

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And now NBviewer is updated.

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In his circles

150 people

An illustrated guide to limiters

Or: how to interpolate non-smooth data without creating wiggles

This is a Jupyter Notebook that explains slope limiters, including TVD limiters and WENO, with code and interactive examples. At the very bottom is an animation showing how several different methods behave for advection of a Gaussian and a square wave.

Or: how to interpolate non-smooth data without creating wiggles

This is a Jupyter Notebook that explains slope limiters, including TVD limiters and WENO, with code and interactive examples. At the very bottom is an animation showing how several different methods behave for advection of a Gaussian and a square wave.

Many interesting wave phenomena -- like fluid dynamics, lasers, and water waves -- are described by nonlinear hyperbolic partial differential equations. The solutions of these problems are discontinuous. So-called limiters (sometimes referred to as slope limiters or flux limiters are one of the ...

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An illustrated guide to limiters

Or: how to interpolate non-smooth data without creating wiggles

This is a Jupyter Notebook that explains slope limiters, including TVD limiters and WENO, with code and interactive examples. At the very bottom is an animation showing how several different methods behave for advection of a Gaussian and a square wave.

Or: how to interpolate non-smooth data without creating wiggles

This is a Jupyter Notebook that explains slope limiters, including TVD limiters and WENO, with code and interactive examples. At the very bottom is an animation showing how several different methods behave for advection of a Gaussian and a square wave.

Many interesting wave phenomena -- like fluid dynamics, lasers, and water waves -- are described by nonlinear hyperbolic partial differential equations. The solutions of these problems are discontinuous. So-called limiters (sometimes referred to as slope limiters or flux limiters are one of the ...

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*pde equation

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Shaheen II is now in KSA.

RESEARCH NEWS: After much anticipation, KAUST’s new Cray XC40 supercomputer, Shaheen II, arrived at KAUST yesterday! As the system is being assembled, stay tuned for upcoming updates and interviews from the University’s leadership and supercomputing team.

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The last great parallel machine? No GPU or Phi nonsense....

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Do you have a Python project that produces plots? Would you like to be able to automatically test whether those plots are correct? Here's one way to do it.

How to use matplotlib's image_comparison decorator in your own project

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Mark Abraham

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+David Ketcheson "The flaming article." I thought you mentioned variability already!

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Apparently Nature does not believe that mathematics or computer science are fields of "scientific research".

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...Or "FORMAL" **Politics**...

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People

In his circles

150 people

Communities

10 communities

Education

- University of WashingtonApplied mathematics, 2009
- Brigham Young University

Basic Information

Gender

Male

Relationship

Married

Story

Tagline

An applied mathematician in Saudi Arabia

Work

Occupation

Applied Mathematician

Employment

- King Abdullah University of Science & TechnologyApplied Mathematician, 2009 - present

Places

Currently

Saudi Arabia

Previously

Utah and New Mexico - Seattle - Caracas

Links

David Ketcheson's +1's are the things they like, agree with, or want to recommend.

Coursera www.coursera.org Take free online classes from 80+ top universities and organizations. Coursera is a social entrepreneurship company partnering with Stanford |

Apotheosis of cynicism and deceit from scholarly publishers www.michaeleisen.org The Association of American Publishers, who lobby on behalf of most for-profit and society scholarly publishers, have long opposed moves to |

KAUST Numerical Mathematics Group: David Ketcheson numerics.kaust.edu.sa Website of the Numerical Mathematics Group at KAUST |

[1110.6834] High-order finite volume schemes for layered atmospheric models arxiv.org Cornell University. Cornell University Library. We gratefully acknowledge supporting institutions. arXiv.org > cs > arXiv:1110.6834. S |

Signing over copyright vs. licensing your journal articles | Martin Paul... www.martineve.com I’ve just had through the request to sign a copyright form for a forthcoming article in a Taylor and Francis journal and duly read through t |

Review of different Open Notebook platforms (by @thescienceofant) | The ... blog.scienceexchange.com Science Exchange Advocate & Open Notebook Scientist Anthony Salvagno (@thescienceofant) reviews Open Notebook platforms including Wordpress, |

The Cost of Knowledge thecostofknowledge.com Researchers Taking a Stand. See the list. Academics have protested against Elsevier's business practices for years with little effect. T |

Mendeley Desktop 1.3 Preview | Mendeley Blog www.mendeley.com A preview of Mendeley Desktop 1.3 is available to test. You can download it here and see the release notes here. This update makes it easie |

» The No New Gifts Holiday Challenge :zenhabits zenhabits.net Post written by Leo Babauta. Are you ready to participate in the mad shopping frenzy that we partake in every year, not only on Black Friday |