i_love_FFT

joined 1 month ago
[–] i_love_FFT@jlai.lu 6 points 3 days ago

I kept seeing this pop up recently, and I finally understand it: it's an introductory problem in Lorentzian general relativity.

AB is a space-like line, while AC is a time-like line. Typically, we would write AC as having distance of 1, but with a metric such that squaring it would produce a negative result. However it's similar to multiplying i to the value.

BC has a distance of 0, but a better way of naming this line would be that it has a null interval, meaning that light would travel following this line and experience no distance nor time going by.

I'm sure PBS Spacetime would explain all of this better than me. I just woke up and can't bother searching for the correct words on my phone.

[–] i_love_FFT@jlai.lu 5 points 1 week ago (1 children)

Wow! It does take some brain training to start seeing something more, but after watching a couple of minutes i can totally relate!

[–] i_love_FFT@jlai.lu 5 points 1 week ago (3 children)

Can you share screenshots of what you're describing? It's send awesome and I'm very curious about it, but I can't find anything similar on search engines.

[–] i_love_FFT@jlai.lu 3 points 3 weeks ago (1 children)

Pump prices are affected by oil price: when oil goes up, pump price goes up. When oil goes down, pump price goes up. Simple as that ;)