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Stefanov, Simeon Tomov


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Professor
Candidate of physico-mathematical sciences
Birth date: 16.11.1954
E-mail:
Keywords: fixed points, Borsuk –Ulam.

Subject:

Geometry, topology.

   
Main publications:
  • S. T. Stefanov. Nekotorye svoistva kompaktov s involyutsiei bez nepodvizhnykh tochek, Serdika, 5(1979), 344–350.
  • S. T. Stefanov. Kogomologicheskii analog - kontinuumov i teorema Mazurkevicha, Serdika, 12 (1986), 88–94.
  • S. T. Stefanov. O skleivanii tochek pri nepreryvnykh otobrazheniyakh -mernogo tora v -mernye mnogoobraziya, Godishnik SU, Fak. Mat. Mekh., 71 (1976/77), (1982), 83–86.
  • S. T. Stefanov. O ponizhayuschikh razmernost otobrazheniyakh sfericheskikh prostranstv, Matematika i matematichesko obrazovanie, 1986, 309–315.
  • S. T. Stefanov, V. Nikiforov. Obobschenie teoremy Borsuka–Ulama, Matematika i matematichesko obrazovanie, 1979, 423–427.
  • S. T. Stefanov, N. Khadzhiivanov. O skleivaniyakh, proiskhodyaschikh pri nepreryvnykh otobrazheniyakh tora v ploskost, Godishnik SU, Fak. Mat. Inf., 84 (1990), 91–96.
  • S. T. Stefanov. Odna teorema o sovpadenii, Godishnik SU, Fak. Mat. Inf., 84 (1990), 49–51.
  • S. T. Stefanov. Edna nesimetrichna teorema za s'vpadenie, Matematika i mekhanika i prilozhenieto im (sbornik rezyumeta i dokladi), Sofiya, 1985, 19.
  • S. T. Stefanov. Teoremi ot Borsuk–Ulamov tip za grupovi deistviya i pototsi, disertatsiya, SU "Sv. Kliment Okhridski", Sofiya, 1994.
  • S. T. Stefanov. Mapping theorems for compacta with an arbitrary involution, Fund. Math., 123 (1984), 169–185.
  • S. T. Stefanov. Mapping theorems for -actions with fixed points, Serdica, 16(1990), 87–93.
  • S. T. Stefanov. Nonexistence of orbital morphisms between dynamical systems on spheres, Annuaire Univ. Sofia Fac. Math. Inf., 83 (1989), 123–128.
  • S. T. Stefanov. Ljusternik–Schnirelman category of the non-wandering set, Annuaire Univ. Sofia Fac. Math. Inf., 84 (1990), 45–50.
  • S. T. Stefanov. A coincidence theorem for orthogonal maps, Annuaire Univ. Sofia Fac. Math. Inf., 86 (1992), 1–12.
  • S. T. Stefanov. A Borsuk–Ulam type theorem for -actions, Annuaire Univ. Sofia Fac. Math. Inf., 87 (1993), 279–286.
  • S. T. Stefanov. Mapping theorems for cohomologically trivial maps, Annuaire Univ. Sofia Fac. Math. Inf., 87 (1993), 287–295.
  • Problem # 6578 proposed by S. T. Stefanov in Amer. Math. Monthly, August, 1988, p. 666; Solution in Amer. Math. Monthly, June–July, 1990, p. 542.
  • Problem # 10476 proposed by S. T. Stefanov in Amer. Math. Monthly, October, 1995, p. 746; Solution in Amer. Math. Monthly, vol. 105, 1998, p. 370.
  • S. T. Stefanov. Yang index of the deleted product, Proceed. Amer. Math. Soc., Mars, 128 (2000), 885–891.
  • S. T. Stefanov. Pr'steni na Boromeo, Matematika, 6, 1999, 2–8.
  • S. T. Stefanov. Edno nablyudenie v'rkhu grafite na Kuratovski, Matematika, 4, 2000, 11–17.
  • S. T. Stefanov. Grafi zapazvaschi chetnostta si, Matematika, 6, 2000, 27–30.
  • S. T. Stefanov, V. Dragieva, Teorema na Kroneker i teorema na Vail za ravnomernoto razpredelenie, Godishnik na DEO-IChS pri SU "Sv. Kl. Okhridski", t. 11, 2002, 218–231.
  • S. T. Stefanov, V. Dragieva, Multidimensional Rolle's theorem with quadratic boundary data, Ann. Inst. foreign stud., Sofia University, v. 11, 2002, 232–237.
  • S. T. Stefanov. Edin kompyut'rno-matematicheski eksperiment, Matematika, 5, 2002, 29–33.
  • S. T. Stefanov. Estimates of the orbital diameter of periodic maps, Ann. Univ. Arch. Civil Eng. Geod., vol. 16, 119–123, 2003.
  • S. T. Stefanov, V. Dragieva. Analytic Bernoulli fixed points free flow on the 3-sphere. Matematika i matematichesko obrazovanie, 2004.
  • S. T. Stefanov, A. L. Hamamdjiev, V. T. Todorov. Euclidean membranes, Matematika i matematichesko obrazovanie, 2004.

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