threshold graph
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Threshold graph — In graph theory, a threshold graph is a graph that can be constructed from a one vertex graph by repeated applications of the following two operations: #Addition of a single isolated vertex to the graph #Addition of a single dominating vertex to… … Wikipedia
Quasi-threshold graph — In graph theoretic mathematics, a quasi threshold graph is a graph that can be constructed using the following rules: # K 1 is a quasi threshold graph #If G is a quasi threshold graph, then so is the graph obtained by adding a new vertex… … Wikipedia
Split graph — In graph theory, a split graph is a graph in which the vertices can be partitioned into a clique and an independent set. Split graphs were first studied by Földes and Hammer in two papers in 1977, and independently introduced by Tyshkevich and… … Wikipedia
Dense graph — In mathematics, a dense graph is a graph in which the number of edges is close to the maximal number of edges. The opposite, a graph with only a few edges, is a sparse graph. The distinction between sparse and dense graphs is rather vague, and… … Wikipedia
Absolute threshold of hearing — The absolute threshold of hearing (ATH) is the minimum sound level of a pure tone that an average ear with normal hearing can hear with no other sound present. The absolute threshold relates to the sound that can just be heard by the… … Wikipedia
Rook's graph — infobox graph name = Rook s graph image caption = 8x8 Rook s graph vertices = nm edges = nm ( n + m )/2 nm diameter = 2 chromatic number = max( n , m ) chromatic index = girth = 3 (if max( n , m ) ≥ 3) properties = regular, vertex transitive,… … Wikipedia
Random geometric graph — In graph theory, a random geometric graph is a random undirected graph drawn on a bounded region, eg. the unit torus [0, 1)2.It is generated by # Placing vertices at random uniformly and independently on the region # Connecting two vertices, u ,… … Wikipedia
Lasing threshold — The lasing threshold is the lowest excitation level at which a laser s output is dominated by stimulated emission rather than by spontaneous emission. Below the threshold, the laser s output power rises slowly with increasing excitation. Above… … Wikipedia
Chordal graph — A cycle (black) with two chords (green). As for this part, the graph is chordal. However, removing one green edge would result in a non chordal graph. Indeed, the other green edge with three black edges would form a cycle of length four with no… … Wikipedia
Unit disk graph — In geometric graph theory, a unit disk graph is the intersection graph of a family of unit circles in the Euclidean plane. That is, we form a vertex for each circle, and connect two vertices by an edge whenever the corresponding circles cross… … Wikipedia
Independent set (graph theory) — The nine blue vertices form a maximum independent set for the Generalized Petersen graph GP(12,4). In graph theory, an independent set or stable set is a set of vertices in a graph, no two of which are adjacent. That is, it is a set I of vertices … Wikipedia
