03 Mathematical logic and foundations
03C68 Other classical first-order model theory (3 articles)
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Mlček, Josef:
End-extensions of countable structures and the induction schema.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 19
(1978),
issue 2,
pp. 291-308
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Pudlák, Pavel:
The observational predicate calculus and complexity of computations (Preliminary communication).
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 16
(1975),
issue 2,
pp. 395-398
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Sochor, Antonín:
Real classes in the ultrapower of hereditarily finite sets.
(English).
Commentationes Mathematicae Universitatis Carolinae,
vol. 16
(1975),
issue 4,
pp. 637-640