一句话:在 n-截断类型论中研究部分 univalence,并解释其与 UIP 不相容的根源。
论文关注 univalence 与 uniqueness of identity proofs (UIP) 的已知冲突:UIP 要求所有类型都是 h-set,而 univalence 会使有限 h-set 在其不是 h-proposition 时产生非平凡自同构,因此二者不能同时成立。作者在 n-truncated type theory 的设定下研究 partial univalence,即对 univalence 加以截断层级限制,以考察其与 UIP 能否相容。摘要给出的核心观察是,冲突并非仅来自一般类型,而是源于有限 h-set 的自同构结构;当有限 h-set 超出 h-proposition 层级时,非平凡自同构必然出现。摘要未展开具体构造、形式化证明或模型评估。
It is well known that univalence is incompatible with uniqueness of identity proofs (UIP), the axiom that all types are h-sets. This is due to finite h-sets having non-trivial automorphisms as soon as they are not h-propositions.