Unital may refer to:
* A
unital algebra – an algebra that contains a multiplicative identity element.
* A
geometric unital – a block design for integer .
* A unital
algebraic structure
In mathematics, an algebraic structure consists of a nonempty set ''A'' (called the underlying set, carrier set or domain), a collection of operations on ''A'' (typically binary operations such as addition and multiplication), and a finite set o ...
, such as a unital magma.
* A
unital map on C*-algebras – a map that preserves the identity element.
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