Section 3 Recommended Software

D2 Coding font, distributed by Naver co., is a very nice free font for LaTeX editors. The font is available at

This is a video format converter software. For example, a video file in webm format can be converted to a file in mp4 format. The home page is at

This is a mathematics computation software based on the Python programming language. SageMath facilitates creating interactive visualizations. The home page is at