sketch whether one could, in a single stroll, cross all seven bridges of the city of Königsberg exactly once and return to a starting point. Following is a of the river with its two islands and seven bridges: as the problem Swiss-born mathematician Leonhard Euler (1)

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Chapter1: Introduction
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as the problem that gave birth to graph
4. Königsberg
Swiss-born mathematician Leonhard Euler (1707-1783). The problem asked
whether one could, in a single stroll, cross all seven bridges of the city of
Königsberg exactly once and return to a starting point. Following is a sketch
of the river with its two islands and seven bridges:
a. State the problem as a graph problem.
b. Does this problem have a solution? If you believe it does, draw such a stroll;
if you believe it does not, explain why and indicate the smallest number of
new bridges that would be required to make such a stroll possible.
5. Icosian Game A century after Euler's discovery (see Problem 4), another
famous puzzle-this one invented by the renowned Irish mathematician Sir
William Hamilton (1805-1865)-was presented to the world under the name
of the Icosian Game. The game's board was a circular wooden board on which
the following graph was carved:
Find a Hamiltonian circuit-a path that visits all the graph's vertices exactly
once before returning to the starting vertex-for this graph.
5. Consider the following problem: Design an algorithm to determine the best
route for a subway passenger to take from one designated station to another in
a well-developed subway system similar to those in such cities as Washington,
D.C., and London, UK.
Transcribed Image Text:al as the problem that gave birth to graph 4. Königsberg Swiss-born mathematician Leonhard Euler (1707-1783). The problem asked whether one could, in a single stroll, cross all seven bridges of the city of Königsberg exactly once and return to a starting point. Following is a sketch of the river with its two islands and seven bridges: a. State the problem as a graph problem. b. Does this problem have a solution? If you believe it does, draw such a stroll; if you believe it does not, explain why and indicate the smallest number of new bridges that would be required to make such a stroll possible. 5. Icosian Game A century after Euler's discovery (see Problem 4), another famous puzzle-this one invented by the renowned Irish mathematician Sir William Hamilton (1805-1865)-was presented to the world under the name of the Icosian Game. The game's board was a circular wooden board on which the following graph was carved: Find a Hamiltonian circuit-a path that visits all the graph's vertices exactly once before returning to the starting vertex-for this graph. 5. Consider the following problem: Design an algorithm to determine the best route for a subway passenger to take from one designated station to another in a well-developed subway system similar to those in such cities as Washington, D.C., and London, UK.
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