In mathematics, Nikiel's conjecture in general topology was a conjectural characterization of the continuous image of a compact total order.
The conjecture was first formulated by Jacek Nikiel [pl] in 1986.
[1] The conjecture was proven by Mary Ellen Rudin in 1999.
[2] The conjecture states that a compact topological space is the continuous image of a total order if and only if it is a monotonically normal space.
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