A Critique of Lin's 'On $\text{NP}$ versus $\text{coNP}$ and Frege Systems'

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Titre: A Critique of Lin's 'On $\text{NP}$ versus $\text{coNP}$ and Frege Systems'
Auteurs: DeJesse, Nicholas, Lyudovyk, Spencer, Pai, Dhruv, Reidy, Michael
Année de publication: 2025
Collection: Computer Science
Mots-clés sujets: Computer Science - Computational Complexity
Description: In this paper, we examine Lin's "On NP versus coNP and Frege Systems" [Lin25]. Lin claims to prove that $\text{NP} \neq \text{coNP}$ by constructing a language $L_d$ such that $L_d \in \text{NP}$ but $L_d \notin \text{coNP}$. We present a flaw in Lin's construction of $D$ (a nondeterministic Turing machine that supposedly recognizes $L_d$ in polynomial time). We also provide a proof that $L_d \not\in \text{NP}$. In doing so, we demonstrate that Lin's claim that $\text{NP} \neq \text{coNP}$ is not established by his paper. In addition, we note that a number of further results that Lin claims are not validly established by his paper.
Type de document: Working Paper
URL d'accès: http://arxiv.org/abs/2505.05658
Numéro d'inventaire: edsarx.2505.05658
Base de données: arXiv
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