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MEAGER-NOWHERE DENSE GAMES (V): CODING STRATEGIES AGAIN

 

作者: Marion Scheepers,  

 

期刊: Quaestiones Mathematicae  (Taylor Available online 1994)
卷期: Volume 17, issue 4  

页码: 419-435

 

ISSN:1607-3606

 

年代: 1994

 

DOI:10.1080/16073606.1994.9631775

 

出版商: Taylor & Francis Group

 

关键词: 90D44

 

数据来源: Taylor

 

摘要:

Players ONE and TWO play the following game of length ω: In then-th inning ONE first chooses a meager subset of the real line; TWO responds with a nowhere dense set. TWO wins only if the union of TWO'S nowhere dense sets is exactly equal to the union of ONE'S first category sets. We prove that TWO has a winning strategy, even if TWO remembers only the most recent two moves each inning (Corollary 8). We show that in a closely related game, the assertion that TWO has a winning strategy depending on only the most recent two moves each inning is equivalent to a weak version of the Singular Cardinals Hypothesis (Theorem 1).

 

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