Kleinian integer

In mathematical cryptography, a Kleinian integer is a complex number of the form m+n\frac{1+\sqrt{-7}}{2}, with m and n rational integers. They are named after Felix Klein.

The Kleinian integers form a ring called the Kleinian ring, which is the ring of integers in the imaginary quadratic field \mathbb{Q}(-7). This ring is a unique factorization domain.

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