Toniolo and Linder, Equation (3b), real

Average Error: 3.8 → 0.2

Time: 28.2s

Precision: binary64

Cost: 32384

Math

\[\frac{\sin ky}{\sqrt{{\sin kx}^{2} + {\sin ky}^{2}}} \cdot \sin th \]

↓

\[\frac{\sin th}{\frac{\mathsf{hypot}\left(\sin kx, \sin ky\right)}{\sin ky}} \]

FPCore

(FPCore (kx ky th)
 :precision binary64
 (* (/ (sin ky) (sqrt (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0)))) (sin th)))

↓

(FPCore (kx ky th)
 :precision binary64
 (/ (sin th) (/ (hypot (sin kx) (sin ky)) (sin ky))))

C

double code(double kx, double ky, double th) {
	return (sin(ky) / sqrt((pow(sin(kx), 2.0) + pow(sin(ky), 2.0)))) * sin(th);
}

↓

double code(double kx, double ky, double th) {
	return sin(th) / (hypot(sin(kx), sin(ky)) / sin(ky));
}

Java

public static double code(double kx, double ky, double th) {
	return (Math.sin(ky) / Math.sqrt((Math.pow(Math.sin(kx), 2.0) + Math.pow(Math.sin(ky), 2.0)))) * Math.sin(th);
}

↓

public static double code(double kx, double ky, double th) {
	return Math.sin(th) / (Math.hypot(Math.sin(kx), Math.sin(ky)) / Math.sin(ky));
}

Python

def code(kx, ky, th):
	return (math.sin(ky) / math.sqrt((math.pow(math.sin(kx), 2.0) + math.pow(math.sin(ky), 2.0)))) * math.sin(th)

↓

def code(kx, ky, th):
	return math.sin(th) / (math.hypot(math.sin(kx), math.sin(ky)) / math.sin(ky))

Julia

function code(kx, ky, th)
	return Float64(Float64(sin(ky) / sqrt(Float64((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))) * sin(th))
end

↓

function code(kx, ky, th)
	return Float64(sin(th) / Float64(hypot(sin(kx), sin(ky)) / sin(ky)))
end

MATLAB

function tmp = code(kx, ky, th)
	tmp = (sin(ky) / sqrt(((sin(kx) ^ 2.0) + (sin(ky) ^ 2.0)))) * sin(th);
end

↓

function tmp = code(kx, ky, th)
	tmp = sin(th) / (hypot(sin(kx), sin(ky)) / sin(ky));
end

Wolfram

code[kx_, ky_, th_] := N[(N[(N[Sin[ky], $MachinePrecision] / N[Sqrt[N[(N[Power[N[Sin[kx], $MachinePrecision], 2.0], $MachinePrecision] + N[Power[N[Sin[ky], $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Sin[th], $MachinePrecision]), $MachinePrecision]

↓

code[kx_, ky_, th_] := N[(N[Sin[th], $MachinePrecision] / N[(N[Sqrt[N[Sin[kx], $MachinePrecision] ^ 2 + N[Sin[ky], $MachinePrecision] ^ 2], $MachinePrecision] / N[Sin[ky], $MachinePrecision]), $MachinePrecision]), $MachinePrecision]

Derivation

1. Initial program 3.8

   \[\frac{\sin ky}{\sqrt{{\sin kx}^{2} + {\sin ky}^{2}}} \cdot \sin th \]

2. Applied egg-rr 0.2

   \[\leadsto \color{blue}{\frac{\sin th}{\frac{\mathsf{hypot}\left(\sin kx, \sin ky\right)}{\sin ky}}} \]

3. Final simplification 0.2

   \[\leadsto \frac{\sin th}{\frac{\mathsf{hypot}\left(\sin kx, \sin ky\right)}{\sin ky}} \]

Alternatives

Alternative 1
Error	15.1
Cost	39048

\[\begin{array}{l} t_1 := \mathsf{hypot}\left(\sin ky, \sin kx\right)\\ \mathbf{if}\;\sin ky \leq -0.05:\\ \;\;\;\;\frac{th}{\frac{t_1}{\sin ky}}\\ \mathbf{elif}\;\sin ky \leq 2 \cdot 10^{-5}:\\ \;\;\;\;ky \cdot \frac{\sin th}{t_1}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 2
Error	38.2
Cost	32848

\[\begin{array}{l} \mathbf{if}\;\sin ky \leq -1 \cdot 10^{-99}:\\ \;\;\;\;\left|\sin th\right|\\ \mathbf{elif}\;\sin ky \leq 10^{-239}:\\ \;\;\;\;ky \cdot \frac{\sin th}{kx}\\ \mathbf{elif}\;\sin ky \leq 10^{-154}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;\sin ky \leq 10^{-65}:\\ \;\;\;\;\sin th \cdot \frac{ky}{kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 3
Error	33.1
Cost	32716

\[\begin{array}{l} \mathbf{if}\;\sin ky \leq -0.05:\\ \;\;\;\;\left|\sin th\right|\\ \mathbf{elif}\;\sin ky \leq -1 \cdot 10^{-121}:\\ \;\;\;\;\frac{th \cdot ky}{\mathsf{hypot}\left(\sin ky, \sin kx\right)}\\ \mathbf{elif}\;\sin ky \leq 10^{-65}:\\ \;\;\;\;ky \cdot \frac{\sin th}{\sin kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 4
Error	0.3
Cost	32384

\[\frac{\sin ky}{\frac{\mathsf{hypot}\left(\sin kx, \sin ky\right)}{\sin th}} \]

Alternative 5
Error	0.3
Cost	32384

\[\sin ky \cdot \frac{\sin th}{\mathsf{hypot}\left(\sin kx, \sin ky\right)} \]

Alternative 6
Error	25.7
Cost	26512

\[\begin{array}{l} t_1 := \sin ky \cdot \frac{\sin th}{\sin kx}\\ \mathbf{if}\;th \leq -3.111273379169212 \cdot 10^{+239}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;th \leq -7.786478892497165 \cdot 10^{+78}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;th \leq -209707512066.2862:\\ \;\;\;\;t_1\\ \mathbf{elif}\;th \leq 8.080884089779525 \cdot 10^{+20}:\\ \;\;\;\;\sin ky \cdot \frac{th}{\mathsf{hypot}\left(\sin kx, \sin ky\right)}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 7
Error	25.7
Cost	26512

\[\begin{array}{l} t_1 := \sin ky \cdot \frac{\sin th}{\sin kx}\\ \mathbf{if}\;th \leq -3.111273379169212 \cdot 10^{+239}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;th \leq -7.786478892497165 \cdot 10^{+78}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;th \leq -209707512066.2862:\\ \;\;\;\;t_1\\ \mathbf{elif}\;th \leq 8.080884089779525 \cdot 10^{+20}:\\ \;\;\;\;\frac{th}{\frac{\mathsf{hypot}\left(\sin ky, \sin kx\right)}{\sin ky}}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 8
Error	33.7
Cost	26184

\[\begin{array}{l} \mathbf{if}\;\sin ky \leq -5 \cdot 10^{-73}:\\ \;\;\;\;\left|\sin th\right|\\ \mathbf{elif}\;\sin ky \leq 10^{-65}:\\ \;\;\;\;ky \cdot \frac{\sin th}{\sin kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 9
Error	43.3
Cost	7380

\[\begin{array}{l} \mathbf{if}\;ky \leq -4611816452890.469:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq -2.342585222820516 \cdot 10^{-162}:\\ \;\;\;\;th \cdot \frac{ky}{\sin kx}\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;ky \cdot \frac{\sin th}{kx}\\ \mathbf{elif}\;ky \leq 9.17795208823107 \cdot 10^{-155}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.12649105432794 \cdot 10^{-66}:\\ \;\;\;\;\sin th \cdot \frac{ky}{kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 10
Error	43.3
Cost	7380

\[\begin{array}{l} \mathbf{if}\;ky \leq -4611816452890.469:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq -5.6396857552704094 \cdot 10^{-154}:\\ \;\;\;\;\frac{th \cdot ky}{\sin kx}\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;ky \cdot \frac{\sin th}{kx}\\ \mathbf{elif}\;ky \leq 9.17795208823107 \cdot 10^{-155}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.12649105432794 \cdot 10^{-66}:\\ \;\;\;\;\sin th \cdot \frac{ky}{kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 11
Error	43.7
Cost	7248

\[\begin{array}{l} t_1 := ky \cdot \frac{\sin th}{kx}\\ \mathbf{if}\;ky \leq -6436289373947435:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;ky \leq 9.17795208823107 \cdot 10^{-155}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.12649105432794 \cdot 10^{-66}:\\ \;\;\;\;t_1\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 12
Error	43.7
Cost	7248

\[\begin{array}{l} \mathbf{if}\;ky \leq -6436289373947435:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;ky \cdot \frac{\sin th}{kx}\\ \mathbf{elif}\;ky \leq 9.17795208823107 \cdot 10^{-155}:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.12649105432794 \cdot 10^{-66}:\\ \;\;\;\;\sin th \cdot \frac{ky}{kx}\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 13
Error	45.2
Cost	6728

\[\begin{array}{l} \mathbf{if}\;ky \leq -6436289373947435:\\ \;\;\;\;\sin th\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;0\\ \mathbf{else}:\\ \;\;\;\;\sin th\\ \end{array} \]

Alternative 14
Error	51.8
Cost	328

\[\begin{array}{l} \mathbf{if}\;ky \leq -6436289373947435:\\ \;\;\;\;th\\ \mathbf{elif}\;ky \leq 5.619515716599004 \cdot 10^{-240}:\\ \;\;\;\;0\\ \mathbf{else}:\\ \;\;\;\;th\\ \end{array} \]

Alternative 15
Error	55.1
Cost	64

\[th \]

Reproduce

herbie shell --seed 2022217 
(FPCore (kx ky th)
  :name "Toniolo and Linder, Equation (3b), real"
  :precision binary64
  (* (/ (sin ky) (sqrt (+ (pow (sin kx) 2.0) (pow (sin ky) 2.0)))) (sin th)))