<ais523> addquote <fungot> boily: i walked 5 miles to get to http://community.schemewiki.org from there. but it\'s written in a relatively portable style?

|a+b@| = { √(a²-b²) if a²-b² ≥ 0 ; i√(a²-b²) if a²-b² < 0 }