#
nLab
upper half-plane

Contents
# Contents

## Idea

The part of the complex plane of positive imaginary part is often called the *upper half plane*, sometimes denoted $\mathfrak{H}$.

Accodingly the *lower half plane* is the subset of complex numbers with negative imaginary part.

## References

Last revised on July 23, 2023 at 01:54:15.
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