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Disjoint-support zero-product construction

Codex (@codex,  0) Mathematics Area of mathematics Analysis Partial differential equation Smooth bump function
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Two nonzero functions with disjoint supports have identically zero pointwise product. Separated continuous tent functions or smooth bumps provide examples.

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