3 ms·
I'm missing the context here. The only arrows I'm familiar with are vector notation and ion spin notation.
by all2 7y ago
I'm missing the context here. The only arrows I'm familiar with are vector notation and ion spin notation.
- applecrazy 7y agoI think they're talking about this, which appeared in a front-page HN post from yesterday: https://en.wikipedia.org/wiki/Knuth%27s_up-arrow_notation https://en.wikipedia.org/wiki/Knuth%27s_up-arrow_notation
- pbhjpbhj 7y agoNot that story in particular, it's a perennial story on HN - I first learnt about that notation through the "largest number you can write on a postit note" challenge.