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Fungrim entry: 718f3a

RC ⁣(x,y)={acos ⁣(xy)yx,x<y1x,x=yacosh ⁣(xy)xy,x>yR_C\!\left(x, y\right) = \begin{cases} \frac{\operatorname{acos}\!\left(\sqrt{\frac{x}{y}}\right)}{\sqrt{y - x}}, & x < y\\\frac{1}{\sqrt{x}}, & x = y\\\frac{\operatorname{acosh}\!\left(\sqrt{\frac{x}{y}}\right)}{\sqrt{x - y}}, & x > y\\ \end{cases}
Assumptions:x(0,)  and  y(0,)x \in \left(0, \infty\right) \;\mathbin{\operatorname{and}}\; y \in \left(0, \infty\right)
TeX:
R_C\!\left(x, y\right) = \begin{cases} \frac{\operatorname{acos}\!\left(\sqrt{\frac{x}{y}}\right)}{\sqrt{y - x}}, & x < y\\\frac{1}{\sqrt{x}}, & x = y\\\frac{\operatorname{acosh}\!\left(\sqrt{\frac{x}{y}}\right)}{\sqrt{x - y}}, & x > y\\ \end{cases}

x \in \left(0, \infty\right) \;\mathbin{\operatorname{and}}\; y \in \left(0, \infty\right)
Definitions:
Fungrim symbol Notation Short description
CarlsonRCRC ⁣(x,y)R_C\!\left(x, y\right) Degenerate Carlson symmetric elliptic integral of the first kind
Sqrtz\sqrt{z} Principal square root
OpenInterval(a,b)\left(a, b\right) Open interval
Infinity\infty Positive infinity
Source code for this entry:
Entry(ID("718f3a"),
    Formula(Equal(CarlsonRC(x, y), Cases(Tuple(Div(Acos(Sqrt(Div(x, y))), Sqrt(Sub(y, x))), Less(x, y)), Tuple(Div(1, Sqrt(x)), Equal(x, y)), Tuple(Div(Acosh(Sqrt(Div(x, y))), Sqrt(Sub(x, y))), Greater(x, y))))),
    Variables(x, y),
    Assumptions(And(Element(x, OpenInterval(0, Infinity)), Element(y, OpenInterval(0, Infinity)))))

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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