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Keywords:
Weak $\omega$-category; weak $\omega$-groupoid; weakly invertible cell; equivalence
Summary:
We study weakly invertible cells in weak $\omega$-categories in the sense of Batanin–Leinster, adopting the coinductive definition of weak invertibility. We show that weakly invertible cells in a weak $\omega$-category are closed under globular pasting. Using this, we generalise elementary properties of weakly invertible cells known to hold in strict $\omega$-categories to weak $\omega$-categories, and show that every weak $\omega$-category has a largest weak $\omega$-subgroupoid.
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