Kalton-Peck Space and its Hyperplanes
Whether the real Kalton-Peck space $Z_2$ is isomorphic to its hyperplanes. It is not: no hyperplane of $Z_2$ is isomorphic to $Z_2$, proved through a rank parity theorem for symplectic spaces applied to the Kalton-Swanson symplectic structure.
Exact FrontierDelta
Scope and record
Occurred: Aug 3, 2026
Delta type: SOURCE CLAIM
Assumptions: VibeMathed verification: unreviewed. Publication: preprint. AI contribution: ai-co-developed. Imported under CC BY 4.0.
Canonical aliases: Kalton-Peck Space and its Hyperplanes · Kalton-Peck hyperplanes
Confidence: Not scored
Registry verification: unreviewed · preprint · resolved
Attribution
VibeMathed
registry · event recorded by
A. Das
human · human collaborator
V. Ferenczi
human · human collaborator
Ch. Rosendal
human · human collaborator
GPT-5.5 Pro-Extended
model · ai model contributor · OpenAI
Lineage and corrections
This event attributed to Ch. Rosendal
This event attributed to V. Ferenczi
This event attributed to A. Das
This event attributed to GPT-5.5 Pro-Extended