http://hdl.handle.net/11089/4140 2026-04-03T19:53:50Z http://hdl.handle.net/11089/31708 On the generalization of the approximate continuity Loranty, Anna This paper contains the concept of the generalization of the ap- proximate continuity. The main result concerns that this continuity is equiv- alent to continuity with respect to some type density topology 2003-01-05T00:00:00Z http://hdl.handle.net/11089/23855 Ideal Convergence of Sequences and Some of its Applications Balcerzak, Marek; Filipczak, Małgorzata We give a short survey of results on ideal convergence with some applications. In particular, we present a contribution of mathematicians from Łódź to these investigations during the recent 16 years. 2017-01-01T00:00:00Z http://hdl.handle.net/11089/18160 Some Non-Measurable Sets Kierus, Alicja This paper contains constructions of some non-measurable sets, based on classical Vitali’s and Bernstein’s constructions (see for example [6]). This constructions probably belong to mathematical folklore, but as far as we know they are rather hard to be found in literature. It seems that the constructed sets can be used as examples in some interesting situations. 2010-01-01T00:00:00Z http://hdl.handle.net/11089/18159 Spatial and age-dependent population dynamics model with an additional structure: can there be a unique solution? Tchuenche, Jean M. A simple age-dependent population dynamics model with an additional structure or physiological variable is presented in its variational formulation. Although the model is well-posed, the closed form solution with space variable is difficult to obtain explicitly, we prove the uniqueness of its solutions using the fundamental Green’s formula. The space variable is taken into account in the extended model with the assumption that the coefficient of diffusivity is unity. 2013-01-01T00:00:00Z