The ordinals of the systems of second order arithmetic with the provably Δ 2 1 -comprehension axiom and with the Δ 2 1 -comprehension axiom respectively
The ordinals of the systems of second order arithmetic with the provably Δ 2 1 -comprehension axiom and with the Δ 2 1 -comprehension axiom respectively
复制标题
分别具有可证明 Δ 2 1 -推导式公理和 Δ 2 1 -推导式公理的二阶算术系统的序数
DOI:
10.4099/jjm1924.41.0_1
复制
发表时间:
1973
期刊:
影响因子:
--
通讯作者:
M. Yasugi
中科院分区:
文献类型:
--
作者:
G. Takeuti;M. Yasugi
Definition 1.15. A proof of second order arithmetic in the tree form formulation with G L C as its logical basis (see [5] for the precise definition) (Including substitution as one of the rules of inference) is called (3-) reducible if it satisfies the following.
DOI:
--
发表时间:
--
期刊:
The Bulletin of Symbolic Logic
影响因子:
--
作者:
Sugiura;K;Nakanishi;H;鈴木雅子・境一三;Ryota Akiyoshi and Grigori Mints
通讯作者:
Ryota Akiyoshi and Grigori Mints