There's a critical distinction between a proof (which establishes truth) and an explanation (which provides understanding). Even when a complex mathematical problem is solved, there remains an 'unsolved expository problem' of making the solution comprehensible. This need for clarity and intuition will remain a crucial area for human or AI effort, even after theorems are proven.

Expert mathematicians adopt formal tools like Lean not primarily to catch errors, but to offload tedious, low-level deductions. This automation allows them to operate at a higher level of abstraction and focus their cognitive energy on creative intuition and problem-solving strategy.

OpenAI's Astra model solving major open math problems highlights a critical issue: even experts cannot easily understand or verify the solutions. This forces a reliance on other AIs or formal proof systems for validation, signaling a future where human comprehension is no longer the gold standard for scientific progress.

AI models tend to produce short, clever mathematical proofs. This is likely not a sign of elegance, but a limitation. They lack the ability to reliably verify their own correctness over long, complex arguments, so they are constrained to producing outputs that are short enough to be checked by humans or other systems.

While AI tools can empower talented students, they also enable amateurs to generate seemingly plausible but incorrect proofs. This floods professional mathematicians with requests to verify AI-assisted work from individuals who lack the foundational skills to check it themselves, creating a new form of expert burden.

AI can generate vast amounts of content, but its value is limited by our ability to verify its accuracy. This is fast for visual outputs (images, UI) where our eyes instantly spot flaws, but slow and difficult for abstract domains like back-end code, math, or financial data, which require deep expertise to validate.

Even if AI could instantly prove any mathematical claim, it wouldn't end the field. The truly creative and valuable work in mathematics lies in higher-level tasks AI can't do: asking interesting questions, identifying fruitful problems, and inventing entirely new branches of mathematics like calculus or information theory.

For tasks involving multi-step logic, evaluating only the final answer is insufficient. True correctness requires process-level evaluation, verifying each step in the AI's reasoning chain. A right conclusion reached through a faulty process is untrustworthy and indicates a model failure.

Simply generating a mathematical proof in natural language is useless because it could be thousands of pages long and contain subtle errors. The pivotal innovation was combining AI reasoning with formal verification. This ensures the output is provably correct and usable, solving the critical problems of trust and utility for complex, AI-generated work.