Potential wadge classes
著者
書誌事項
Potential wadge classes
（Memoirs of the American Mathematical Society, no. 1038）
American Mathematical Society, c2012
大学図書館所蔵 全11件
注記
"January 2013, volume 221, number 1038 (second of 5 numbers)."
Includes bibliographical references (p. 83)
内容説明・目次
内容説明
Let $\bf\Gamma$ be a Borel class, or a Wadge class of Borel sets, and $2\!\leq\! d\!\leq\!\omega$ be a cardinal. A Borel subset $B$ of ${\mathbb R}^d$ is potentially in $\bf\Gamma$ if there is a finer Polish topology on $\mathbb R$ such that $B$ is in $\bf\Gamma$ when ${\mathbb R}^d$ is equipped with the new product topology. The author provides a way to recognize the sets potentially in $\bf\Gamma$ and applies this to the classes of graphs (oriented or not), quasi-orders and partial orders.
「Nielsen BookData」 より