OpenAI reports a complex affine-space cancellation counterexample
- Mathematics
There is an explicit integral complex affine fourfold X such that X × A¹ is isomorphic to A⁵ but X is not isomorphic to A⁴.
OpenAI reports a complex affine-space cancellation counterexample
- Mathematics
There is an explicit integral complex affine fourfold X such that X × A¹ is isomorphic to A⁵ but X is not isomorphic to A⁴.
Curated contributions 1
Understand the problem ↓Understanding the problem
Read the background
There is an explicit integral complex affine fourfold X such that X × A¹ is isomorphic to A⁵ but X is not isomorphic to A⁴.
Why it matters
If correct, gives a negative answer to complex affine-space cancellation in dimension four.
What counts as progress
Can a complex affine fourfold have affine five-space as its cylinder without itself being affine four-space?
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OpenAI reports a complex affine-space cancellation counterexample