Persons: Ospichev, Sergey Sergeevich

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Ospichev, Sergey Sergeevich

Candidate of physico-mathematical sciences (2013)

Speciality:

01.01.06 (Mathematical logic, algebra, and number theory)

E-mail:

Website:

https://ospichev.github.io

Keywords:

hierarchy, numberlings.

Subject:

Numberlings of difference hierarchy.

https://www.mathnet.ru/eng/person32324

List of publications on Google Scholar

	Publications in Math-Net.Ru	Citations
	2021
1.	N. A. Bazhenov, M. Mustafa, S. S. Ospichev, “On universal pairs in the Ershov hierarchy”, Sibirsk. Mat. Zh., 62:1 (2021), 31–41 ; Siberian Math. J., 62:1 (2021), 23–31
	2020
2.	N. A. Bazhenov, M. Mustafa, S. S. Ospichev, M. M. Yamaleev, “Numberings in the analytical hierarchy”, Algebra Logika, 59:5 (2020), 594–599 ; Algebra and Logic, 59:5 (2020), 404–407	7
3.	S. Goncharov, S. Ospichev, D. Ponomaryov, D. Sviridenko, “The expressiveness of looping terms in the semantic programming”, Sib. Èlektron. Mat. Izv., 17 (2020), 380–394	4
	2019
4.	S. S. Ospichev, “Friedberg numberings of families of partial computable functionals”, Sib. Èlektron. Mat. Izv., 16 (2019), 331–339
	2018
5.	S. Ospichev, D. Ponomarev, “On the complexity of formulas in semantic programming”, Sib. Èlektron. Mat. Izv., 15 (2018), 987–995	8
	2015
6.	S. S. Ospichev, “Friedberg numberings in the Ershov hierarchy”, Algebra Logika, 54:4 (2015), 444–462 ; Algebra and Logic, 54:4 (2015), 283–295	11
7.	S. S. Ospichev, “Computable families of sets in Ershov hierarchy without principal numberings”, Vestn. Novosib. Gos. Univ., Ser. Mat. Mekh. Inform., 15:1 (2015), 54–62 ; J. Math. Sci., 215:4 (2016), 529–536	2
	2011
8.	S. S. Ospichev, “Infinite family of $\Sigma_a^{-1}$-Sets with only One Computable Numbering”, Vestn. Novosib. Gos. Univ., Ser. Mat. Mekh. Inform., 11:2 (2011), 89–92 ; J. Math. Sci., 188:4 (2013), 449–451	6
	2010
9.	S. S. Ospichev, “Some Properties of Numberings in Various Levels in Ershov's Hierarchy”, Vestn. Novosib. Gos. Univ., Ser. Mat. Mekh. Inform., 10:4 (2010), 125–132 ; J. Math. Sci., 188:4 (2013), 441–448	5

Presentations in Math-Net.Ru

1.	Rogers semilattices S. S. Ospichev August 12, 2021 16:40

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