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Author: Kalas, Josef

• Došlý, Ondřej; Jansová, Eva; Kalas, Josef: Eighty fifth anniversary of birthday and scientific legacy of Professor Miloš Ráb. (English). Archivum Mathematicum, vol. 50 (2014), issue 1, pp. 1-19
• Kalas, Josef; Rebenda, Josef: Asymptotic behaviour of a two-dimensional differential system with a nonconstant delay under the conditions of instability. (English). Mathematica Bohemica, vol. 136 (2011), issue 2, pp. 215-224
• Kalas, Josef: Asymptotic properties of an unstable two-dimensional differential system with delay. (English). Mathematica Bohemica, vol. 131 (2006), issue 3, pp. 305-319
• Kalas, Josef: Asymptotic behaviour of a difference equation with complex-valued coefficients. (English). Archivum Mathematicum, vol. 41 (2005), issue 3, pp. 311-323
• Kalas, Josef: Asymptotic properties of a two-dimensional differential system with delay. (English). In: Fila, Marek, Handlovičová, A., Mikula, K., Medveď, Milan, Quittner, Pavol and Ševčovič, Daniel (eds.): Proceedings of Equadiff 11, International Conference on Differential Equations. Czecho-Slovak series, Bratislava, July 25-29, 2005. [Part 2] Minisymposia and contributed talks. Comenius University Press, Bratislava, 2007. pp. 171-180
• Kalas, Josef: The use of Lyapunov functions in uniqueness and nonuniqueness theorems. (English). Archivum Mathematicum, vol. 36 (2000), issue 5, pp. 469-476
• Kalas, Josef: Nonuniqueness results for ordinary differential equations. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 2, pp. 373-384
• Kalas, Josef: Contributions to the asymptotic behaviour of the equation $\dot z=f(t,z)$ with a complex-valued function $f$. (English). Czechoslovak Mathematical Journal, vol. 40 (1990), issue 1, pp. 31-45
• Kalas, Josef: Asymptotic behaviour of the equation $\dot z=G(t,z)[h(z)+g(t,z)]$. (English). Archivum Mathematicum, vol. 25 (1989), issue 3, pp. 195-206
• Kalas, Josef: Some results on the asymptotic behaviour of the equation $\dot z=f(t,z)$ with a complex-valued function $f$. (English). Archivum Mathematicum, vol. 21 (1985), issue 4, pp. 195-199
• Kalas, Josef: Asymptotic nature of solutions of the equation $\dot z=f(t,z)$ with a complex valued function $f$. (English). Archivum Mathematicum, vol. 20 (1984), issue 2, pp. 83-94
• Kalas, Josef: On certain asymptotic properties of the solutions of the equation $\dot z=f(t,z)$ with a complex-valued function $f$. (English). Czechoslovak Mathematical Journal, vol. 33 (1983), issue 3, pp. 390-407
• Kalas, Josef: On a “Liapunov like” function for an equation $\dot z=f(t,z)$ with a complex-valued function $f$. (English). Archivum Mathematicum, vol. 18 (1982), issue 2, pp. 65-76
• Kalas, Josef: Asymptotic behaviour of equations $\dot z=q(t,z)-p(t)z^2$ and $\ddot x=x\varphi (t,\dot xx^{-1})$. (English). Archivum Mathematicum, vol. 17 (1981), issue 4, pp. 191-206
• Kalas, Josef: Asymptotic properties of the solutions of the equation $\dot z=f(t,z)$ with a complex-valued function $f$. (English). Archivum Mathematicum, vol. 17 (1981), issue 3, pp. 113-123
• Kalas, Josef: On the asymptotic behaviour of the equation $dz/dt=f(t,z)$ with a complex-valued function $f$. (English). Archivum Mathematicum, vol. 17 (1981), issue 1, pp. 11-22
• Kalas, Josef: Nonuniqueness for the solutions of ordinary differential equations. (English). Czechoslovak Mathematical Journal, vol. 29 (1979), issue 1, pp. 105-112
• Kalas, Josef: Asymptotic behaviour of the system of two differential equations. (English). Archivum Mathematicum, vol. 11 (1975), issue 3, pp. 175-186