Irish traditional music bouzouki players may play single note melody instead of harmonizing accompaniment, but in live acoustic sessions with more than two or three players but it is difficult to produce sufficient volume to be heard over drumming and the piercing sound of fiddles and penny whistles. Although not traditional, the Irish bouzouki has found a home in the modern Irish traditional music scene. The Greek bouzouki was introduced to Irish traditional music in the late 1960s by Johnny Moynihan and then popularised by Dónal Lunny, Andy Irvine, and Alec Finn. Today's Irish bouzouki (usually) has four courses of two strings (usually)
Shannon capacity of a graph eight neighbors, the eight strings that it can be confused with. A subset of length-two strings forms a code with no possible confusion if and only if it corresponds to an independent set of this graph. The set of code words {"11", "23", "35", "54", "42"} forms one of these independent sets, of maximum size. If "G" is a graph representing the signals and confusable pairs of a channel, then the graph representing the length-two codewords and their confusable pairs is "G" ⊠ "G", where the symbol "⊠" represents the strong product of graphs. This is a graph that has