I wrote how I solved the error in Homebrew, “Error: Cask adoptopenjdk8 exists in multiple taps”.

Proof: Triangle Inequality

Let’s prove \(|PR| \leq |PQ| + |QR| \) for the destances among 3 points \(P, Q, R \in \mathbb{R}^n\).

Python 3: List Basic

Sorry, this entry is only available in 日本語.

I’ve written cover story 2, “[Practical] Kotlin”, in WEB+DB PRESS Vol. 109. My parts are chapter 2, 3 and 5.

One day, my WordPress shows Sorry, your request cannot be accepted, and I can’t log in to the site. I summarized how to do in such cases.

If you got the message as I got, I recommend you to try the following. In my case, IP GEO Block plugin wqs the reason.