Homepage of Jaap Spies

Some Information

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Some information, if you really want to know: Personal


Retired Mathematics Teacher/College Lecturer and Computer Scientist.


Sailing in a Dutch Traditional 'Vollenhovense Bol 8.50 m'. Image of a Happy Sailor

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

Some links

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

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