Homepage of Jaap Spies


Some information, if you really want to know.


Retired Mathematics Teacher/College Lecturer and Computer Scientist.


Sailing in a Dutch Traditional 'Vollenhovense Bol 8.50 m'.

Unix/Linux. Open Source.

Programming in Python and Sage.

Sage is a free open-source mathematics software system.

Solving Mathematical Problems

OEIS, The On-Line Encyclopedia of Integer Sequences. Search for Jaap Spies


Many more


My visit to Saint Petersburg (Dutch) wapen

Sage Days 6 in Bristol. See my pictures Day 1, Day 2, Day 3, Day 4, Day 5, Day 6 (extra),

Sailing at the 5ECM.

Sage Days 10 in Nancy. Some photos.

Sage Days 23 in Leiden. Official website Lorentz Center.

Spies Sage Development Prize

See my bookmarks

http://validator.w3.org http://w3.org/Amaya

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