To mark with an asterisk. Usage Note: The phonological phenomenon of metathesis involves the transposition of sounds or syllables in a word. Metathesis is responsible for the common rendering of ask as aks or ax. (This issue is discussed comprehensively at ax.) Similarly, one sometimes hears asterisk pronounced with the sk transposed to produce a (ks) sound, as though the word were spelled asterix or astericks.
Given an Euler brick with edges (a, b, c), the triple (bc, ac, ab) constitutes an Euler brick as well. Perfect cuboid Template:Unsolved A perfect cuboid (also called a perfect box) is an Euler brick whose body diagonal is also an integer.
Definition Edit. An Eulerian trail, or Euler walk in an undirected graph is a walk that uses each edge exactly once. If such a walk exists, the graph is called traversable or semi-eulerian. An Eulerian cycle, Eulerian circuit or Euler tour in an undirected graph is a cycle that uses each edge exactly once. If such a cycle exists, the graph is called Eulerian or unicursal. The term Eulerian graph is also sometimes used in a weaker sense to denote a graph where every vertex has even degree.