What is the nationality of the creator of Instiki?
David Heinemeier Hansson David Heinemeier Hansson (born 15 October 1979; known to the Ruby and car racing communities as DHH) is a Danish programmer and the creator of the popular Ruby on Rails web development framework and the Instiki wiki. He is also a partner at the web-based software development firm Basecamp (formerly 37signals).
Richard Rusczyk Richard Rusczyk ( or ; ] , born 21 September 1971, is the founder of Art of Problem Solving (AoPS) Inc. (as well as the website, which serves as a mathematics forum and place to hold online classes) and a co-author of the Art of Problem Solving textbooks. He is one of the co-creators of the Mandelbrot Competition, and the director of the USA Mathematical Talent Search (USAMTS). He also founded the San Diego Math Circle.