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Fungrim entry: 7189d6

agm ⁣(a,b)=agm ⁣(a,b)\operatorname{agm}\!\left(-a, -b\right) = -\operatorname{agm}\!\left(a, b\right)
Assumptions:aC  and  bC  and  (a=0  or  ba(,0])a \in \mathbb{C} \;\mathbin{\operatorname{and}}\; b \in \mathbb{C} \;\mathbin{\operatorname{and}}\; \left(a = 0 \;\mathbin{\operatorname{or}}\; \frac{b}{a} \notin \left(-\infty, 0\right]\right)
\operatorname{agm}\!\left(-a, -b\right) = -\operatorname{agm}\!\left(a, b\right)

a \in \mathbb{C} \;\mathbin{\operatorname{and}}\; b \in \mathbb{C} \;\mathbin{\operatorname{and}}\; \left(a = 0 \;\mathbin{\operatorname{or}}\; \frac{b}{a} \notin \left(-\infty, 0\right]\right)
Fungrim symbol Notation Short description
AGMagm ⁣(a,b)\operatorname{agm}\!\left(a, b\right) Arithmetic-geometric mean
CCC\mathbb{C} Complex numbers
OpenClosedInterval(a,b]\left(a, b\right] Open-closed interval
Infinity\infty Positive infinity
Source code for this entry:
    Formula(Equal(AGM(Neg(a), Neg(b)), Neg(AGM(a, b)))),
    Variables(a, b),
    Assumptions(And(Element(a, CC), Element(b, CC), Or(Equal(a, 0), NotElement(Div(b, a), OpenClosedInterval(Neg(Infinity), 0))))))

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Copyright (C) Fredrik Johansson and contributors. Fungrim is provided under the MIT license. The source code is on GitHub.

2021-03-15 19:12:00.328586 UTC