Monopoly: Exclusive control of a
particular market that is marked by the power to
control prices and
exclude competition.
Mathematics is collaboratively and publicly produced, it is vetted for free by peers, and results are publicly available. There is no 'market' and no 'price'.
These results, like the invention of LLMs, are often used by private companies for the generation of private profit.
"Open" AI used a private, unreleased, for-profit model to generate those papers.
What, precisely, did the mathematics 'oligopoly' gatekeep you, or anyone, from?
> their slice of the pie
There's very little money in academia, and even then, its a struggle to get any funding at all. What are you even talking about?
Final point, 'knowledge' is socially produced as well. Until the papers are accepted, they are machine artifacts that might be knowledge, but that same system you disdain will be what incorporates and validates those insights.