isomorphic graph

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United States Electoral College votes by state

How Many Electoral College Votes Does Each U.S. State Have?

Washington DC.,USA, April 26, 1989. Supporters for and against legal abortion face off during a protest outside the United States Supreme Court Building during Webster V Health Services

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Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.

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United States electoral college map showing number of electoral votes by state.

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United States elections portal page linking to each election interactive

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isomorphic graph

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definition

In combinatorics: Definitions
…H are said to be isomorphic (written G ≃ H) if there exists a one–one correspondence between their vertex sets that preserves adjacency. For example, G₁ and G₂, shown in Figure 3, are isomorphic under the correspondence x_i ↔ y_i.
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