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Fungrim entry: 4d2168

atan ⁣(x+y)atan(x)<π\left|\operatorname{atan}\!\left(x + y\right) - \operatorname{atan}(x)\right| < \pi
Assumptions:xR  and  yRx \in \mathbb{R} \;\mathbin{\operatorname{and}}\; y \in \mathbb{R}
TeX:
\left|\operatorname{atan}\!\left(x + y\right) - \operatorname{atan}(x)\right| < \pi

x \in \mathbb{R} \;\mathbin{\operatorname{and}}\; y \in \mathbb{R}
Definitions:
Fungrim symbol Notation Short description
Absz\left|z\right| Absolute value
Atanatan(z)\operatorname{atan}(z) Inverse tangent
Piπ\pi The constant pi (3.14...)
RRR\mathbb{R} Real numbers
Source code for this entry:
Entry(ID("4d2168"),
    Formula(Less(Abs(Sub(Atan(Add(x, y)), Atan(x))), Pi)),
    Variables(x, y),
    Assumptions(And(Element(x, RR), Element(y, RR))))

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2020-08-27 09:56:25.682319 UTC