Order Preserving or Increasing Mappings Freedom or Incomparability Preserving Mappings
Publications de l'Institut Mathématique, _N_S_45 (1989) no. 59, p. 17 .

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One recalls the definitions of increasing, SI, (s.~2:0) ASI(s.~3:0) mappings of ordered sets and introduces FP mappings (s.~4:0). Main theorems 2:2, 2:2:7, 3:1, 3:5:1, 4:8 are established.
Classification : 06A10 05C05
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     author = {{\DJ}uro Kurepa},
     title = {Order {Preserving} or {Increasing} {Mappings} {Freedom} or {Incomparability} {Preserving} {Mappings}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {17 },
     publisher = {mathdoc},
     volume = {_N_S_45},
     number = {59},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1989_N_S_45_59_a3/}
}
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Đuro Kurepa. Order Preserving or Increasing Mappings Freedom or Incomparability Preserving Mappings. Publications de l'Institut Mathématique, _N_S_45 (1989) no. 59, p. 17 . http://geodesic.mathdoc.fr/item/PIM_1989_N_S_45_59_a3/