Timeline for Can all unit-distance graphs have their vertices at algebraic integers?
Current License: CC BY-SA 3.0
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| Jan 26, 2015 at 4:27 | comment | added | Geoffrey Exoo | Or one could simply ask for the minimum degree of a field extension (over the rationals) that can be used for the coordinates of a specific graph, e.g., the Moser graph. What is the minimum such value for any 4-chromatic plane graph? | |
| Jan 26, 2015 at 2:34 | history | answered | Joseph O'Rourke | CC BY-SA 3.0 |