Journal of Symbolic Logic
- J. Symbolic Logic
- Volume 64, Issue 3 (1999), 984-990.
The Ground-Negative Fragment of First-Order Logic is $\Pi^p_2$-Complete
Abstract
We prove that for a natural class of first-order formulas the validity problem is $\Pi^p_2$-complete.
Article information
Source
J. Symbolic Logic, Volume 64, Issue 3 (1999), 984-990.
Dates
First available in Project Euclid: 6 July 2007
Permanent link to this document
https://projecteuclid.org/euclid.jsl/1183745866
Mathematical Reviews number (MathSciNet)
MR1779747
Zentralblatt MATH identifier
0941.03039
JSTOR
links.jstor.org
Citation
Voronkov, Andrei. The Ground-Negative Fragment of First-Order Logic is $\Pi^p_2$-Complete. J. Symbolic Logic 64 (1999), no. 3, 984--990. https://projecteuclid.org/euclid.jsl/1183745866
