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1953, birth in Eindhoven, NL.

1971-79,
education in Biology and Architecture.
1980, question of pattern formation of sunflower seeds: “How can I produce these spirals without a pencil?" (no continuous curve, nor application of numeric values).

1987, Aristid Lindenmayer supports my algorithm which develops phyllotactic patterns.
1994 PhD - Biology in Architecture.
1990, 1996, 1998, scientific publication of basic principles.

2015, introducing the concept of Phyllotactic beauty, I propose to play with Apex, the geometrical phyllotaxis generator, which celebrates it's 25th anniversary.