Geodesic
Pyramidal structure of constructibility degrees
Matematičeskie zametki, Tome 63 (1998) no. 4, pp. 632-635 
V. G. Kanovei; J. Zapletal. Pyramidal structure of constructibility degrees. Matematičeskie zametki, Tome 63 (1998) no. 4, pp. 632-635. http://geodesic.mathdoc.fr/item/MZM_1998_63_4_a17/
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Voir la notice de l'article provenant de la source Math-Net.Ru

[1] Baumgartner J. E., Laver R., Ann. Math. Logic, 17 (1979), 271–288 | DOI | MR | Zbl

[2] Kanovei V., “On non-wellfounded iterations of perfect set forcing”, J. Symbolic Logic (to appear)