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Published online by Cambridge University Press: 26 July 2023
We aim at developing a systematic method of separating omniscience principles by constructing Kripke models for intuitionistic predicate logic  $\mathbf {IQC}$ and first-order arithmetic
$\mathbf {IQC}$ and first-order arithmetic  $\mathbf {HA}$ from a Kripke model for intuitionistic propositional logic
$\mathbf {HA}$ from a Kripke model for intuitionistic propositional logic  $\mathbf {IPC}$. To this end, we introduce the notion of an extended frame, and show that each IPC-Kripke model generates an extended frame. By using the extended frame generated by an IPC-Kripke model, we give a separation theorem of a schema from a set of schemata in
$\mathbf {IPC}$. To this end, we introduce the notion of an extended frame, and show that each IPC-Kripke model generates an extended frame. By using the extended frame generated by an IPC-Kripke model, we give a separation theorem of a schema from a set of schemata in  $\mathbf {IQC}$ and a separation theorem of a sentence from a set of schemata in
$\mathbf {IQC}$ and a separation theorem of a sentence from a set of schemata in  $\mathbf {HA}$. We see several examples which give us separations among omniscience principles.
$\mathbf {HA}$. We see several examples which give us separations among omniscience principles.
 ${\varDelta}_1^0$
 variants of the law of excluded middle and related principles
. 
Archive for Mathematical Logic
, vol. 61 (2022), nos. 7–8, pp. 1113–1127.CrossRefGoogle Scholar
${\varDelta}_1^0$
 variants of the law of excluded middle and related principles
. 
Archive for Mathematical Logic
, vol. 61 (2022), nos. 7–8, pp. 1113–1127.CrossRefGoogle Scholar ${\varSigma}_1^0$
sentences: Explorations between intuitionistic propositional logic and intuitionistic arithmetic
. 
Annals of Pure and Applied Logic
, vol. 114 (2002), nos. 1–3, pp. 227–271, Commemorative Symposium Dedicated to Anne S. Troelstra (Noordwijkerhout, 1999).CrossRefGoogle Scholar
${\varSigma}_1^0$
sentences: Explorations between intuitionistic propositional logic and intuitionistic arithmetic
. 
Annals of Pure and Applied Logic
, vol. 114 (2002), nos. 1–3, pp. 227–271, Commemorative Symposium Dedicated to Anne S. Troelstra (Noordwijkerhout, 1999).CrossRefGoogle Scholar