Modal Formulas are Either Elementary or not ΣΔ-Elementary

✍ Scribed by J. F. A. K. Van Benthem

• Book ID: 124972483
• Publisher: Association for Symbolic Logic
• Year: 1976
• Tongue: English
• Weight: 112 KB
• Volume: 41
• Category: Article
• ISSN: 0022-4812
• DOI: 10.2307/2272242