How accurate is this two-pass approach in general? From my outsider's perspective, it always looked like most of the difficulty in implementing Lanczos was reorthogonalization, which will be hard to do with the two-pass algorithm.
Or is this mostly a problem when you actually want to calculate the eigenvectors themselves, and not just matrix functions?
"Esports" is not a league. That would be like saying "sports" is a league.
There are leagues around some games (like the ones mentioned in the article). There are also events with "league" in the name that are not really leagues (like ESL Pro League). In any case, none of them are financially successful in the US.
Or is this mostly a problem when you actually want to calculate the eigenvectors themselves, and not just matrix functions?