In mathematics, a Hamiltonian path in a graph is a path that visits each vertex precisely once. A Hamiltonian cycle is a cycle which visits each vertex once and only once.
This type of path is named after William Rowan Hamilton who invented a puzzle, now known as Hamilton's puzzle, about the construction of such paths.
... of the island. From the 32,000 Russians (of whom over 22,150 were convicts) at the beginning of 20th century, the population grew to 673,100 today, 83% from whom are ...