chisquared

2 years agodiscuss

> We don't recommend oh-my-fish for various reasons

Care to elaborate a bit on those? Or is it the kind of thing that's impolite to discuss?

chisquared

2 years agodiscuss

There’s no need for this extension: https://news.ycombinator.com/item?id=42425681

chisquared

2 years agodiscuss

If b is negative, define c = -b, and use the linked result to show that

a^2 - b^2 = a^2 - (-c)^2 = a^2 - c^2 = (a + c)(a - c) = (a + b)(a - b)

chisquared

2 years agodiscuss

> Then you've just skipped the case when a^2 - b^2 is negative.

Not really. If b > a, then swap them to conclude that b^2 - a^2 = (b + a)(b - a), which is what the visual proof demonstrates.

Your conclusion is equivalent to saying that a^2 - b^2 = (a + b)(a - b).

chisquared

2 years agodiscuss

Steve Jobs would have agreed with you at one point.

I'm not sure what changed his mind (or if he ever even really did), but he also thought that aside from the native apps that came with the iPhone, everything else should just be a web app.

chisquared

3 years agodiscuss

Huh, is this what Nix users mean by “impure”?

If so, then it makes so much more sense to me now.

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