We prove that it is NP-hard to properly PAC learn decision trees with queries, resolving a longstanding open problem in learning theory (Bshouty 1993; Guijarro–Lavín–Raghavan 1999; Mehta–Raghavan 2002 ...

Violation of laws and regulations by listed companies is one of the main reasons for continuously disturbing China's securities market in recent years. How to effectively analyze and deal with ...