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In this contribution a method for graphical solving any quadratic equation as well as a method for graphing quadratic functions by means of the Cabri Geometry is shown. The goal is to provide high school 's students with the visual idea how parameter in both equations and functions is doing.
In this paper we establish an approximation of subquadratic functions, which satisfy the condition ∃ ϵ > 0 ∀ x ϵ X |ϕ(2x) - 4ϕ(x)| ≤ 3ϵ, by quadratic functions.
In this paper we study K-superquadratic set-valued functions.We will present here some connections between K-boundedness of K-superquadratic set-valued functions and K-semicontinuity of multifunctions of this kind.
Let X = (X, +) be an arbitrary topological group. A set-valued function F : X → n(Y) is called K-subquadratic if 2F(s) + 2F(t) ⊂ F(s + t) + F(s - t) + K, for all s, t ϵ X, where Y denotes a topological vector space and where K is a cone in this space. In this paper the K-continuity problem of multifunctions of this kind will be considered with respect to weakly K-boundedness. The case where Y = RN...
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