凸函数（英文：Convex function）是指函数图形上，任意兩點連成的線段，皆位於圖形的上方的实值函数， [1] 如單變數的二次函数和指数函数。 二階可導的一元函數 f {\displaystyle f} 為凸， …

Convex is the open-source reactive database for app developers. From database schemas to queries, from auth to APIs, express every part of your backend in pure TypeScript. Your …

2020年2月1日 · 最简单也是最直观的辨识方法是，如果曲线的凹凸部位位于两点连接的直线（即下图中的紫色线）下方，则为convex函数（如下图所示）。 如果曲线的凹凸部位位于两点连接 …

In mathematics, a real-valued function is called convex if the line segment between any two distinct points on the graph of the function lies above or on the graph between the two points. …

2021年7月13日 · Concave and convex are literal opposites—one involves shapes that curve inward and the other involves shapes that curve outward. The terms can be used generally, …

2021年3月2日 · An object with a convex shape is one that curves outward, such as a basketball or a baseball. The middle is thicker than the edges. The words concave and convex describe …

2023年9月9日 · Concave lenses focus light inside the curve of the lens, while convex lenses focus light using the outer curve. A lens that curves like a “C” (no flat side) is both concave or …

2020年4月7日 · convex（凸函数）指的是V形状的函数，concave（凹函数）指的是^形状的函数。 实际上，我们最好不要用凹函数这一说法，推行上凸和下凸（描述函数的凸性），都是凸函数 …

2024年9月22日 · In this article, we will explore the key concepts of convex and concave functions, their mathematical properties, and how to identify and apply them in various fields. We'll also …

Convex is the open source, reactive database where queries are TypeScript code running right in the database. Just like React components react to state changes, Convex queries react to …