Below is the graph of a quadratic function, showing where the function is increasing and decreasing. If we draw in the tangents to the curve, you will notice that if the gradient of the tangent is ...

Abstract. In this paper, we first investigate abstract convexity of non-negative increasing and radiant (IR) functions over a topological vector space X. We also characterize the essential results of ...

Six graphs that clearly show that the supply of batteries is increasing exponentially and will continue to expand in the future This article, originally posted in Japanese on 16:00 Feb 05, 2024 ...

Necessary and sufficient conditions for convexity of lower semi-continuous quasiconvex functions are given. By applying these results to positively homogeneous functions it is shown that if f is a ...