exotic sphere

Questions

What does exotic sphere mean?

A manifold (of any dimension) homeomorphic to a sphere but not diffeomorphic to the standard sphere.

How to pronounce exotic sphere

1. Open the pronunciation page — Open the Speakur entry for “exotic sphere”.
2. Read the phonetic spelling — Read the IPA spelling () so you know which sounds to aim for.
3. Play the audio — Click Play to hear reference audio for “exotic sphere”.
4. Repeat and practice — Say “exotic sphere” aloud, matching stress and vowels until it feels natural.