Yeah, sadly. It is a stock trading app which requires credentials checking, I guess.

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I desire to install Linux on the laptop, but one stock market app my dad frequent only runs on winblows :<

Indeed.

I am not a topologist, but I can try…

A space (shape) is contractible if you can “contract” (shrink) it to a point without cutting, pinching or punching through holes. For example, a mattress is contractible, since you can shrink it to the center - each point can follow the line to the center, continuously. Meanwhile, a doughnut, a circle or a hollow sphere are not contractible, you can never remove the inner “hole” to shrink to a point without cutting.

In general, any dimensional sphere is not contractible… Until it is - infinite dimensional sphere is contractible. Somehow, it loses the “hollow space” inside.

Is this opinion piece implying that quantum computing researchers should stop researching because current quantum computers are currently less than proof of concept? Is technology supposed to be fully mature from the beginning?