作者: Bernhard Irrgang
DOI: 10.1090/S0002-9939-08-09525-7
关键词: Construct (python library) 、 Discrete mathematics 、 Forcing (recursion theory) 、 Suslin tree 、 Mathematics
摘要: We introduce a method of constructing forcing along simplified (k, 1)-morass such that the satisfies κ-chain condition. Alternatively, this may be seen as to thin out larger get chain As an application, we construct ccc adds ω 2 -Suslin tree. Related methods are Shelah's historic and Todorcevic's ρ-functions.