Suppose that therearefour employees in the computer support group of the School of Engineering of a large university. Each employee will be assigned to support one of four different areas: hardware, software, networking, and wireless. Suppose that Ping is qualified to support hardware, networking, and wireless; Ouiggley is qualified to support software and networking; Ruiz is qualified to support networking and wireless, and Site a is qualified to support hardware and software.
a) Use a bipartite graph to model the four employees and their qualifications.
b) Use Hall's theorem to determine whether there is an assignment of employees to support areas so that each employee is assigned oneareato support.
c) If an assignment of employees to support areas so that each employee is assigned to one support area exists, find one.
Want to see the full answer?
Check out a sample textbook solutionChapter 10 Solutions
Discrete Mathematics and Its Applications ( 8th International Edition ) ISBN:9781260091991
- A square with two diagonals drawn is a complete graph.arrow_forwarddetermine the number of vertices and edgesand find the in-degree and out-degree of each vertex for the given directed multigraph.arrow_forwardThe word rock can refer to a type of music or to somethingfrom a mountain. Construct a word graph forthese nouns: rock, boulder, jazz, limestone, gravel, folk,bachata, pumice, granite, tango, klezmer, slate, shale,classical, pebbles, sand, rap, marble. Connect two verticesby an undirected edge if the nouns they representhave similar meaning.arrow_forward
- Can someone cross all the bridges shown in this map exactly once and return to the starting point?arrow_forwardHow many edges would a connected planar graph if it has 13 vertices and 9 faces?arrow_forwardShow that in a simple graph with at least Two vertices there must be two vertices that have the same degree.arrow_forward
- What does the degree of a vertex represent in an academiccollaboration graph? What does the neighborhood of avertex represent? What do isolated and pendant verticesrepresent?arrow_forwardLazio Airline has the following flying routes: Rome (1) to London (2) London to Rome Rome to Copenaghen (3) Copenaghen to London Rome to Berlin (4) Paris to London Rome to Praha (5) Madrid to Praha Praha to Berlin Berlin to Rome Berlin to Copenaghen Paris to Madrid (8) Rome to Paris (7) Madrid to Rome (a) Draw a graph that represent the connections of Lazio Airlines (I already labeled the cities with numbers) (b) By looking at the adjacency matrix A and its powers find the minimum number of flights that you need to connect any two cities. (c) Compute A², what is the entry A4? Explain what is the meaning of that entry?arrow_forwardConstruct a simple graph with vertices J, K, L, M whose degrees are 0, 2, 2, 2 What is the edge set?arrow_forward
- A simple graph with many edges has a label on each edge. The current labels are "a", "b", "c", "d", "e" and "f". To simplify the representation, the labels will be changed to colors. The edges will be recolored with 6 colors, blue (B), green (G), purple (P), red (R), orange (O), and yellow (Y). In how many ways can we redraw the graph by replacing each label with a color?arrow_forwardThe first floor plan of a commercial building is shown at the right. Draw a graph (with complete label) that represents the floor plan, where each vertex represents a room/location and an edge connects two vertices if there is a doorway between the two rooms/locations. Then answer the following questions: Room A Room E Room D Room B Room Carrow_forwardA 4-partite graph is bipartite.True or Falsearrow_forward
- College Algebra (MindTap Course List)AlgebraISBN:9781305652231Author:R. David Gustafson, Jeff HughesPublisher:Cengage Learning