In mathematics, given a positive integer g {\displaystyle g} , the Siegel upper half-space H g {\displaystyle {\mathcal {H}}_{g}} of degree g {\displaystyle g} is the set of g × g {\displaystyle g\times g} symmetric matrices over the complex numbers whose imaginary part is positive definite. It was introduced by Siegel (1939).
In mathematics, given a positive integer g {\displaystyle g} , the Siegel upper half-space H g {\displaystyle {\mathcal {H}}_{g}} of degree g {\displaystyle g} is the set of g × g {\displaystyle g\times g} symmetric matrices over the complex numbers whose imaginary part is positive definite. It was introduced by Siegel (1939).
Source: Wikipedia "Siegel upper half-space" · CC BY-SA 4.0
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