The problem had to do with proving whether Conway’s knot was something called “slice,” an important concept in knot theory that we’ll get to a little later. Of all the many thousands of knots with ...

HSI has completed work on the 22-knot, 150-passenger SWATH tour vessel Navatek II, which began service in late January as the newest ship in the Royal Hawaiian Cruises fleet. SLICE is a high-speed ...