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| title = Graph Drawing: DIMACS International Workshop, GD '94 Princeton, New Jersey, USA, October 10–12, 1994, Proceedings
| volume = 894
| year = 1995}}.</ref> and [[planar graphs]] can be embedded in 2-dimensional Euclidean space <math>\mathbb{R}^2.</math>
Often, an '''embedding''' is regarded as an equivalence class (under homeomorphisms of <math>\Sigma</math>) of representations of the kind just described.
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