Variations on $\Diamond$
Devlin, Keith J.
J. Symbolic Logic, Tome 44 (1979) no. 1, p. 51-58 / Harvested from Project Euclid
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Various equivalents and weakenings of the combinatorial principle $\diamond$ are considered. The paper contains both absolute results and consistency results. Also included is a new characterisation of the notion of a stationary subset of $\omega_1$.
Publié le : 1979-03-14
Classification:  
@article{1183740344,
     author = {Devlin, Keith J.},
     title = {Variations on $\Diamond$},
     journal = {J. Symbolic Logic},
     volume = {44},
     number = {1},
     year = {1979},
     pages = { 51-58},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183740344}
}

Devlin, Keith J. Variations on $\Diamond$. J. Symbolic Logic, Tome 44 (1979) no. 1, pp.  51-58. http://gdmltest.u-ga.fr/item/1183740344/