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A unital -algebra is an $\mathbb{Z}$-algebra with
A unital -algebra is an H-space in abelian groups.
Every untial -algebra where has a two-sided inverse is contractible.
Every contractible type is a unital -algebra.
The integers are a unital -algebra.
The rational numbers are a unital -algebra.
Last revised on June 13, 2022 at 21:14:32. See the history of this page for a list of all contributions to it.