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Tome 96

Dimiter Skordev,
Some short historical notes on development of mathematical logic in Sofia

Angel Ditchev,
Some results on the uppersemilattice of R.E. mdegrees inside a single R.E. ttdegree

Alexandra Soskova, Ivan Soskov,
Cospectra of joint spectra of structures

Ivan Soskov,
Degree spectra and cospectra of structures

Nikolay Khadzhiivanov, Nedyalko Nenov,
Generalized Turan's graph theorem

Nedyalko Nenov,
Bounds of the vertex Folkman number F(4,4;5)

Nedyalko Nenov,
Lower bounds for some Ramsey numbers

Dimiter Skordev,
Maximal depths of Boolean functions

Petar Manolov, Kerope Tchakerian,
(2,3)generation of the groups PSL${}_4\big(2^m\big)$

Sevdzhan Hakkaev,
Instability of solitary wave solutions of a class of nonlinear dispersive systems

Nedyu Popivanov, Todor Popov,
Estimates for the singular solutions of the 3D Protter's problem

Borislav Draganov,
The trigonometric analogue of the Taylor's formula and its application

Diana Stoeva,
Existence of strong Mbases in nonseparable Banach spaces

Vsevolod Ivanov,
On lower bounds of the secondorder Dini directional derivatives

Nikolay Khadzhiivanov, Nedyalko Nenov,
Letter to the editor. Turan's theorem and maximal degrees
