plural of number line

(mathematics) A line that graphically represents the real numbers as a series of points whose distance from an origin is proportional to their value

plural of Betti number

(topology, algebraic topology) Any of a sequence of numbers, denoted bₙ, which characterise a given topological space K by giving, for each dimension, the number of holes in K of said dimension; (formally) the rank of the nth homology group, Hₙ, of K.

plural of ordinal number

(mathematics) By means of, or in terms of, number theory.

(graph theory) the number of edges in a maximum matching, often denoted 𝜈=𝜈(G)

(graph theory) the number of vertices in a maximum independent set of a given graph, often denoted as 𝛼=𝛼(G)

(graph theory) the number of vertices in a minimum dominating set of a given graph, often denoted as 𝛾=𝛾(G)

(graph theory) The number of vertices in a minimum vertex cover of a graph, often denoted as 𝜏=𝜏(G).