as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
give three examples of a non-deterministic turing machine.
user
1. simultaneous halting oracles
2. a turing machine that solves the halting problem
3. a turing machine that solves the word problem for monoids
assistant