Priestley duality, a Sahlqvist theorem and a Goldblatt-Thomason theorem for positive modal logic

Abstract

Priestley duality, a Sahlqvist theorem and a Goldblatt-Thomason theorem for positive modal logic Get access S Celani, S Celani Search for other works by this author on: Oxford Academic Google Scholar R Jansana R Jansana Search for other works by this author on: Oxford Academic Google Scholar Logic Journal of the IGPL, Volume 7, Issue 6, November 1999, Pages 683–715, https://doi.org/10.1093/jigpal/7.6.683 Published: 01 November 1999