Some notes on Boolos' semantics

genesis, ontological quests and model-theoretic equivalence to standard semantics

125-154

An elementary system of axioms for Euclidean geometry based on symmetry principles

Boris Čulina

155-180

Solving smullyan puzzles with formal systems

Diogo Poças

181-199

N. A. Vasil'ev's logic and the problem of future random events

Dmitry Maximov

201-217

The constitution as an axiomatic system

Vitaly Ogleznev, Valeriy Surovtsev

219-232

Scientific foundation of business models theory

research traditions approach

Tadeusz Sierotowicz, Tomasz Sierotowicz

233-245

Fiction

impossible!

Martin Vacek

247-252