# 「2021年08月」一覧

## How to solve simultaneous linear equation with a tridiagonal matrix

A tridiagonal matrix, a special but easy to use matrix is introduced. Here, looking into a simultaneous linear eq...

## Converting decimal numbers to k-decimal with C++

We sometimes need to convert decimal numbers to the k-decimal ones. For example, in the...

## Let’s use queue brilliantly!Breadth First Search with C++!

BFS (Breadth-First Search) is one of the popular ways to search all of the vertices on a given graph. I write this article to understand well.

## Expected value of the number of trials until it occurs with probability p

An expected value of the number of trials with probability p is calculated. It's not so hard to see why but for my understanding I tried to calculate it.