Business

It is important to have the trading wisdom and develop skills to remain relevant in any investment climate in order to secure one’s financial future. Especially with the recent economic uncertainties and escalating political tension in the world, volatile markets seem to be here to stay.  As such, Phillip CFD organised a special presentation with Mr Ray Barros on 30^th April 2011 to help guide our clients on a step-by-step ...

我時常聽別人說: “買ROE高的股票就必定是好的投資!!”

今天我要在這兒大聲疾呼 "買ROE高的股票不一定是好投資!!"。

何必執著 - PE, PB & ROE (一)

This is a short how to about how to sum sin(n q) and cos(n q).

如何有效地融資，這是一家企業不時會面對的問題，較常用的融資方法有股本融資及借貸，那麼應該用股本融資還是借貸來籌集資金呢? 站在股東的角度，哪種方法比較有利呢?

就晨訊科技中期報告, 作出對手機和M2M 業務作出簡單的財務和營商環境分析

This paper is inspired by this post. It asked how to count the number of solutions of the equation with non-negative integral solution:

x_1 + ... + x_k = n

without using the standard method of line and dot counting. I transform the problem into a partial difference equation, ...

I tried to find the n-th derivative of the function sec x + tan x in a specific form, and a partial difference equation arises from it. An attemp to solve the equation is stated in another article: Reducing a partial difference equation into a partial differential equation and solving for the generating function using method of characteristics

I am going to solve a partial difference equation, firstly to transform it into a partial differential equation by using generating function method. Then, the partial differential equation can be solved by using method of characteristics.

In this paper, I will derive an explicit formula for the Euler zigzag numbers (Up/down numbers). Euler zigzag number is the number of alternating permutation in a set. Therefore the explicit formula of Euler numbers(Secant numbers) and Bernoulli numbers are found as well. The formula involves two finite sum.