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		new Array(new Array('Degree', '17.15.5')),
		new Array(new Array('Degree vs. no. of edges', '17.15.6'))
	),
	new Array(new Array('Paths and Circuits', '17.16'),
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		new Array(new Array('Walks, paths, circuits', '17.16.2')),
		new Array(new Array('Connectedness', '17.16.3')),
		new Array(new Array('Euler\'s theorem', '17.16.4')),
		new Array(new Array('Constr. an Euler circuit', '17.16.5')),
		new Array(new Array('Hamiltonian circuits', '17.16.6')),
		new Array(new Array('Traveling salesperson', '17.16.7'))
	),
	new Array(new Array('Matrix Reps. of Graphs', '17.17'),
		new Array(new Array('Matrix notation', '17.17.1')),
		new Array(new Array('Adjacency', '17.17.2')),
		new Array(new Array('Matrix multiplication', '17.17.3')),
		new Array(new Array('No. of walks of length n', '17.17.4'))
	),
	new Array(new Array('Isomorphisms of Graphs', '17.18'),
		new Array(new Array('Definition', '17.18.1')),
		new Array(new Array('Finding noniso. graphs', '17.18.2')),
		new Array(new Array('Isomorphic invariants', '17.18.3')),
		new Array(new Array('Showing graphs noniso.', '17.18.4'))
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		new Array(new Array('Definition and examples', '17.19.1')),
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		new Array(new Array('Rooted trees', '17.19.3')),
		new Array(new Array('Binary trees', '17.19.4'))
	),
	new Array(new Array('Spanning Trees', '17.20'),
		new Array(new Array('Definition', '17.20.1')),
		new Array(new Array('Existence', '17.20.2')),
		new Array(new Array('Finding minimal', '17.20.3'))
	),
	new Array(new Array('Social Choice and Voting Theory', '17.21'),
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		new Array(new Array('Voting methods', '17.21.2')),
		new Array(new Array('Apportionment methods', '17.21.3')),
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)
);