Do NOT use capital letters for propositional variables. Use:

- false for bottom
- true for top
- ^ for conjunction
- v for disjunction
- ! for negation
- -> for material implication
- => for conditional implication

CK+CEM+MP(+ID), CK+CSO(+MP+CEM) are not available.

Remember that flat CK+ID+CSO=cumulative logic C

NESCOND implements the nested sequent calculi for normal conditional logics introduced and described in the following papers, where you can find more details about them:

Regis Alenda, Nicola Olivetti, Gian Luca Pozzato. **Nested Sequents Calculi for Normal Conditional Logics**, to appear in the Journal of Logic and Computation

Regis Alenda, Nicola Olivetti, Gian Luca Pozzato, **Nested Sequent Calculi for Conditional Logics. **In Luis Farinas del Cerro, Andreas Herzig, Jéròme Mengin, Eds, Logics in Artificial Intelligence - 13th European Conference, JELIA 2012, Lecture Notes in Artificial Intelligence 7519, Springer, pp. 14 - 27, 2012

The theorem prover NESCOND is described in the following papers:

Nicola Olivetti, Gian Luca Pozzato. **NESCOND: an Implementation of Nested Sequent Calculi for Conditional Logics**, In Stephane Demri, Deepak Kapur, Christoph Weidenbach, Eds, Proceedings of IJCAR 2014 (7th International Joint Conference on Automated Reasoning), Lecture Notes in Artificial Intelligence LNAI 8562, Springer, pp. 511-518, 2014.

Nicola Olivetti, Gian Luca Pozzato. **Nested Sequent Calculi and Theorem Proving for Normal Conditional Logics**, In Marianna Nicolosi Asmundo, Domenico Cantone, Eds, Proceedings of CILC 2013, CEUR Workshop Proceedings 1068, pp. 49 - 63, 2013.

Copyright 2013 Nicola Olivetti, Gian Luca Pozzato. NESCOND is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. NESCOND is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with NESCOND. If not, see http://www.gnu.org/licenses/.