Epimorphisms between linear orders
arXiv:1403.2158 · doi:10.1007/s11083-014-9339-3
Abstract
We study the relation on linear orders induced by order preserving surjections. In particular we show that its restriction to countable orders is a bqo.
15 pages; in version 2 we corrected some typos and rewrote the paragraphs introducing the results of subsection 3.3 (statements and proofs are unchanged)