The groupoid model refutes uniqueness of identity proofs
The groupoid model refutes uniqueness of identity proofs
复制标题
DOI:
10.1109/lics.1994.316071
复制
发表时间:
1994-07
期刊:
影响因子:
--
通讯作者:
M. Hofmann;T. Streicher
中科院分区:
文献类型:
--
作者:
M. Hofmann;T. Streicher
We give a model of intensional Martin-Lof type theory based on groupoids and fibrations of groupoids in which identity types may contain two distinct elements which are not even prepositionally equal. This shows that the principle of uniqueness of identity proofs is not derivable in the syntax.>