[vouaobrasil]

You can't be serious. This is a highly specialized field in a topic that a few dozen people have interest in. Rather useless and basically a mental stimulating game for some professors. I have a math PhD and know very well that math went well past its point of diminishing returns in solving real-world problems a long time ago.

[glial]

You asked for a thorny problem, and that is one. Whether it's significant by some other metric you didn't specify is a separate question.