Math Problem Statement
Is this isomorphic
Solution
Yes, the two graphs depicted in the image are isomorphic. Here's why:
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Same Number of Vertices: Both graphs have six vertices ( and ).
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Same Number of Edges: Both graphs have the same number of edges. The connections between vertices are equivalent, even if the arrangement looks different.
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Preserved Degree Sequence: The degree of each vertex (number of edges connected to it) is preserved between the two graphs:
- For the left graph (, , etc.):
- , : degree 3.
- , , , : degree 2.
- For the right graph (, , etc.):
- , : degree 3.
- , , , : degree 2. The degree sequence of the two graphs matches.
- For the left graph (, , etc.):
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One-to-One Correspondence: A mapping exists between vertices of the two graphs that preserves adjacency. For example:
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Connectivity Matches: The adjacency of vertices in the two graphs corresponds perfectly after relabeling the vertices.
Thus, the two graphs are isomorphic.
Do you want a detailed proof or specific steps to verify isomorphism? Let me know!
Expanding Questions:
- How can we systematically check for graph isomorphism using adjacency matrices?
- What are some applications of identifying graph isomorphism in real-world problems?
- Could these graphs be representations of a real-world network, like a communication system?
- How does the degree sequence help in determining isomorphism?
- What algorithms exist for automating the process of verifying graph isomorphism?
Tip: When checking for isomorphism visually, focus on degree sequence and connectivity as initial steps to identify possible mappings.
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Math Problem Analysis
Mathematical Concepts
Graph Theory
Graph Isomorphism
Formulas
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Theorems
Graph Isomorphism Theorem
Suitable Grade Level
Undergraduate Level