Author Archives: Sung Lee

Constellation (TV series) and Many-Worlds Interpretation

Posted on February 24, 2024 by Sung Lee

There is a new TV series titled Constellation on Apple TV+. The plot so far (I don’t intend to be a spoiler and I don’t actually know much about the plot either because there have been only three episodes) is … Continue reading →

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Coffee and Mathematics

Posted on February 17, 2024 by Sung Lee

I don’t remember who said it but someone (could be one of French mathematicians) said “Mathematicians are those who turn coffee into theorems“. It rings so true to me. I love coffee. I love its smell and taste. The smell … Continue reading →

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Square Root of the Klein-Gordon Operator

Posted on February 13, 2024 by Sung Lee

Replacing $E$ and $p$ by $i\hbar\frac{\partial}{\partial t}$ and $-i\hbar\nabla$, respectively, in the energy-momentum relation $$E^2=p^2c^2+m_0^2c^4$$ we obtain the Klein-Gordon operator $$\square=\frac{m_0^2c^2}{\hbar^2},$$ where $$\square=-\frac{1}{c^2}\frac{\partial^2}{\partial t^2}+\nabla^2$$ $\square$ is called the d’Alembertian or the wave operator. This time, replacing $E$ and $p$ by … Continue reading →

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Ubuntu Boot-Repair

Posted on February 5, 2024 by Sung Lee

If you have Ubuntu Linux OS installed in your computer and your computer does not boot into Ubuntu, most likely it is a GRUB issue. It can be easily fixed using Boot-Repair. First you need to have a bootable Ubuntu … Continue reading →

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Islands of Space

Posted on February 5, 2024 by Sung Lee

I stumbled upon a Wikipedia entry that says the idea of warp drive first appeared in the sci-fi novel Islands of Space by John W. Campbell Jr. If I were a rare book collector, I would’ve wanted to buy the … Continue reading →

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