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2. Simple matching coefficient - Wikipedia

   en.wikipedia.org/wiki/Simple_matching_coefficient

   The simple matching coefficient (SMC) or Rand similarity coefficient is a statistic used for comparing the similarity and diversity of sample sets. [1] [better source needed] Given two objects, A and B, each with n binary attributes, SMC is defined as: where. is the total number of attributes where A has value 1 and B has value 0.

3. Matching (graph theory) - Wikipedia

   en.wikipedia.org/wiki/Matching_(graph_theory)

   In the mathematical discipline of graph theory, a matching or independent edge set in an undirected graph is a set of edges without common vertices. [1] In other words, a subset of the edges is a matching if each vertex appears in at most one edge of that matching. Finding a matching in a bipartite graph can be treated as a network flow problem ...

4. Maximum cardinality matching - Wikipedia

   en.wikipedia.org/wiki/Maximum_cardinality_matching

   Maximum cardinality matching. Maximum cardinality matching is a fundamental problem in graph theory. [1] We are given a graph G, and the goal is to find a matching containing as many edges as possible; that is, a maximum cardinality subset of the edges such that each vertex is adjacent to at most one edge of the subset.

5. Perfect matching - Wikipedia

   en.wikipedia.org/wiki/Perfect_matching

   Perfect matching. In graph theory, a perfect matching in a graph is a matching that covers every vertex of the graph. More formally, given a graph G = (V, E), a perfect matching in G is a subset M of edge set E, such that every vertex in the vertex set V is adjacent to exactly one edge in M . A perfect matching is also called a 1-factor; see ...

6. Pair of $1 bills with same printing error could be worth ...

   www.aol.com/pair-1-bills-same-printing-221612078...

   The serial number features a star and sits somewhere between "B00000001★ – B00250000★" or "B03200001★-B09600000★" You must have two $1 bills that match this criteria. $2 dollar bills ...

7. Number matching - Wikipedia

   en.wikipedia.org/wiki/Number_matching

   Number matching or matching numbers is a term often used in the collector car industry to describe cars with original major components, or major components that match one another. Many times these major components contain dates, casting numbers, model numbers, Vehicle Identification Numbers (VIN), stamped numbers, or codes that can match the ...

8. Petersen's theorem - Wikipedia

   en.wikipedia.org/wiki/Petersen's_theorem

   The theorem is due to Julius Petersen, a Danish mathematician. It can be considered as one of the first results in graph theory. The theorem appears first in the 1891 article " Die Theorie der regulären graphs ". [1] By today's standards Petersen's proof of the theorem is complicated.

9. Stable marriage problem - Wikipedia

   en.wikipedia.org/wiki/Stable_marriage_problem

   Stable marriage problem. In mathematics, economics, and computer science, the stable marriage problem (also stable matching problem) is the problem of finding a stable matching between two equally sized sets of elements given an ordering of preferences for each element. A matching is a bijection from the elements of one set to the elements of ...