This essential oil has been used for almost 100 years in Australia but is now available worldwide both as neat oil and as an active component in an array of products. The primary uses of tea tree oil have historically capitalized on the antiseptic and anti-inflammatory actions of the oil.
A computer graph is a graph in which every two distinct vertices are joined by exactly one edge. The complete graph with n vertices is denoted by Kn. The following are the examples of complete graphs. The graph Kn is regular of degree n-1, and therefore has 1/2n(n-1) edges, by consequence 3 of the handshaking lemma.
Given a graph and a graph, is a subgraph of if and only if and. A clear result of this is that the every graph has as subgraphs at least the empty graph and itself, as the empty graph has as its vertex and edge set the empty set, both of which are subsets of every set, and and.