论文信息 - On Closure Under Direct Product - 字舞流文

On Closure Under Direct Product

C. C. Chang | Anne C. Morel | C. C. Chang | Anne C. Morel

[1] A. Tarski. Contributions to the theory of models. III , 1954 .

[2] Kurt Bing. On arithmetical classes not closed under direct union , 1955 .