27 research outputs found

    Linear orders: When embeddability and epimorphism agree

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    When a linear order has an order preserving surjection onto each of its suborders, we say that it is strongly surjective. We prove that the set of countable strongly surjective linear orders is a D\u2c72(\u3a011)-complete set. Using hypotheses beyond ZFC, we prove the existence of uncountable strongly surjective orders
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