Average Error: 17.9 → 8.7
Time: 20.2s
Precision: binary64
Cost: 20748
\[\left(\left(-2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot \sqrt{1 + {\left(\frac{U}{\left(2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)}\right)}^{2}} \]
\[\begin{array}{l} t_0 := \cos \left(\frac{K}{2}\right)\\ t_1 := J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{t_0 \cdot \left(J \cdot 2\right)}\right) \cdot \left(t_0 \cdot -2\right)\right)\\ \mathbf{if}\;J \leq -1.0377437032178969 \cdot 10^{-236}:\\ \;\;\;\;t_1\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U\\ \mathbf{elif}\;J \leq 1.0640764951653267 \cdot 10^{-249}:\\ \;\;\;\;-U\\ \mathbf{else}:\\ \;\;\;\;t_1\\ \end{array} \]
(FPCore (J K U)
 :precision binary64
 (*
  (* (* -2.0 J) (cos (/ K 2.0)))
  (sqrt (+ 1.0 (pow (/ U (* (* 2.0 J) (cos (/ K 2.0)))) 2.0)))))
(FPCore (J K U)
 :precision binary64
 (let* ((t_0 (cos (/ K 2.0)))
        (t_1 (* J (* (hypot 1.0 (/ U (* t_0 (* J 2.0)))) (* t_0 -2.0)))))
   (if (<= J -1.0377437032178969e-236)
     t_1
     (if (<= J -1.054361271269357e-266)
       U
       (if (<= J 1.0640764951653267e-249) (- U) t_1)))))
double code(double J, double K, double U) {
	return ((-2.0 * J) * cos((K / 2.0))) * sqrt((1.0 + pow((U / ((2.0 * J) * cos((K / 2.0)))), 2.0)));
}
double code(double J, double K, double U) {
	double t_0 = cos((K / 2.0));
	double t_1 = J * (hypot(1.0, (U / (t_0 * (J * 2.0)))) * (t_0 * -2.0));
	double tmp;
	if (J <= -1.0377437032178969e-236) {
		tmp = t_1;
	} else if (J <= -1.054361271269357e-266) {
		tmp = U;
	} else if (J <= 1.0640764951653267e-249) {
		tmp = -U;
	} else {
		tmp = t_1;
	}
	return tmp;
}
public static double code(double J, double K, double U) {
	return ((-2.0 * J) * Math.cos((K / 2.0))) * Math.sqrt((1.0 + Math.pow((U / ((2.0 * J) * Math.cos((K / 2.0)))), 2.0)));
}
public static double code(double J, double K, double U) {
	double t_0 = Math.cos((K / 2.0));
	double t_1 = J * (Math.hypot(1.0, (U / (t_0 * (J * 2.0)))) * (t_0 * -2.0));
	double tmp;
	if (J <= -1.0377437032178969e-236) {
		tmp = t_1;
	} else if (J <= -1.054361271269357e-266) {
		tmp = U;
	} else if (J <= 1.0640764951653267e-249) {
		tmp = -U;
	} else {
		tmp = t_1;
	}
	return tmp;
}
def code(J, K, U):
	return ((-2.0 * J) * math.cos((K / 2.0))) * math.sqrt((1.0 + math.pow((U / ((2.0 * J) * math.cos((K / 2.0)))), 2.0)))
def code(J, K, U):
	t_0 = math.cos((K / 2.0))
	t_1 = J * (math.hypot(1.0, (U / (t_0 * (J * 2.0)))) * (t_0 * -2.0))
	tmp = 0
	if J <= -1.0377437032178969e-236:
		tmp = t_1
	elif J <= -1.054361271269357e-266:
		tmp = U
	elif J <= 1.0640764951653267e-249:
		tmp = -U
	else:
		tmp = t_1
	return tmp
function code(J, K, U)
	return Float64(Float64(Float64(-2.0 * J) * cos(Float64(K / 2.0))) * sqrt(Float64(1.0 + (Float64(U / Float64(Float64(2.0 * J) * cos(Float64(K / 2.0)))) ^ 2.0))))
end
function code(J, K, U)
	t_0 = cos(Float64(K / 2.0))
	t_1 = Float64(J * Float64(hypot(1.0, Float64(U / Float64(t_0 * Float64(J * 2.0)))) * Float64(t_0 * -2.0)))
	tmp = 0.0
	if (J <= -1.0377437032178969e-236)
		tmp = t_1;
	elseif (J <= -1.054361271269357e-266)
		tmp = U;
	elseif (J <= 1.0640764951653267e-249)
		tmp = Float64(-U);
	else
		tmp = t_1;
	end
	return tmp
end
function tmp = code(J, K, U)
	tmp = ((-2.0 * J) * cos((K / 2.0))) * sqrt((1.0 + ((U / ((2.0 * J) * cos((K / 2.0)))) ^ 2.0)));
end
function tmp_2 = code(J, K, U)
	t_0 = cos((K / 2.0));
	t_1 = J * (hypot(1.0, (U / (t_0 * (J * 2.0)))) * (t_0 * -2.0));
	tmp = 0.0;
	if (J <= -1.0377437032178969e-236)
		tmp = t_1;
	elseif (J <= -1.054361271269357e-266)
		tmp = U;
	elseif (J <= 1.0640764951653267e-249)
		tmp = -U;
	else
		tmp = t_1;
	end
	tmp_2 = tmp;
end
code[J_, K_, U_] := N[(N[(N[(-2.0 * J), $MachinePrecision] * N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision] * N[Sqrt[N[(1.0 + N[Power[N[(U / N[(N[(2.0 * J), $MachinePrecision] * N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]), $MachinePrecision], 2.0], $MachinePrecision]), $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
code[J_, K_, U_] := Block[{t$95$0 = N[Cos[N[(K / 2.0), $MachinePrecision]], $MachinePrecision]}, Block[{t$95$1 = N[(J * N[(N[Sqrt[1.0 ^ 2 + N[(U / N[(t$95$0 * N[(J * 2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision] ^ 2], $MachinePrecision] * N[(t$95$0 * -2.0), $MachinePrecision]), $MachinePrecision]), $MachinePrecision]}, If[LessEqual[J, -1.0377437032178969e-236], t$95$1, If[LessEqual[J, -1.054361271269357e-266], U, If[LessEqual[J, 1.0640764951653267e-249], (-U), t$95$1]]]]]
\left(\left(-2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot \sqrt{1 + {\left(\frac{U}{\left(2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)}\right)}^{2}}
\begin{array}{l}
t_0 := \cos \left(\frac{K}{2}\right)\\
t_1 := J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{t_0 \cdot \left(J \cdot 2\right)}\right) \cdot \left(t_0 \cdot -2\right)\right)\\
\mathbf{if}\;J \leq -1.0377437032178969 \cdot 10^{-236}:\\
\;\;\;\;t_1\\

\mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\
\;\;\;\;U\\

\mathbf{elif}\;J \leq 1.0640764951653267 \cdot 10^{-249}:\\
\;\;\;\;-U\\

\mathbf{else}:\\
\;\;\;\;t_1\\


\end{array}

Error

Try it out

Your Program's Arguments

Results

Enter valid numbers for all inputs

Derivation

  1. Split input into 3 regimes
  2. if J < -1.03774370321789687e-236 or 1.0640764951653267e-249 < J

    1. Initial program 14.8

      \[\left(\left(-2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot \sqrt{1 + {\left(\frac{U}{\left(2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)}\right)}^{2}} \]
    2. Simplified5.6

      \[\leadsto \color{blue}{J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot 2\right)}\right) \cdot \left(-2 \cdot \cos \left(\frac{K}{2}\right)\right)\right)} \]
      Proof
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (*.f64 J 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (Rewrite<= *-commutative_binary64 (*.f64 2 J))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (Rewrite<= *-commutative_binary64 (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (Rewrite<= hypot-1-def_binary64 (sqrt.f64 (+.f64 1 (*.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 44 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (sqrt.f64 (+.f64 1 (Rewrite<= unpow2_binary64 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite=> *-commutative_binary64 (*.f64 (*.f64 -2 (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite<= associate-*r*_binary64 (*.f64 -2 (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 J -2) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 (Rewrite<= *-commutative_binary64 (*.f64 -2 J)) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (*.f64 -2 J) (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 10 points decrease in error

    if -1.03774370321789687e-236 < J < -1.05436127126935705e-266

    1. Initial program 40.7

      \[\left(\left(-2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot \sqrt{1 + {\left(\frac{U}{\left(2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)}\right)}^{2}} \]
    2. Simplified27.5

      \[\leadsto \color{blue}{J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot 2\right)}\right) \cdot \left(-2 \cdot \cos \left(\frac{K}{2}\right)\right)\right)} \]
      Proof
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (*.f64 J 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (Rewrite<= *-commutative_binary64 (*.f64 2 J))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (Rewrite<= *-commutative_binary64 (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (Rewrite<= hypot-1-def_binary64 (sqrt.f64 (+.f64 1 (*.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 44 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (sqrt.f64 (+.f64 1 (Rewrite<= unpow2_binary64 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite=> *-commutative_binary64 (*.f64 (*.f64 -2 (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite<= associate-*r*_binary64 (*.f64 -2 (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 J -2) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 (Rewrite<= *-commutative_binary64 (*.f64 -2 J)) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (*.f64 -2 J) (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 10 points decrease in error
    3. Taylor expanded in K around 0 64.0

      \[\leadsto \color{blue}{-2 \cdot \left(\sqrt{1 + 0.25 \cdot \frac{{U}^{2}}{{J}^{2}}} \cdot J\right)} \]
    4. Simplified49.6

      \[\leadsto \color{blue}{\sqrt{\mathsf{fma}\left(0.25, \frac{U}{J} \cdot \frac{U}{J}, 1\right)} \cdot \left(J \cdot -2\right)} \]
      Proof
      (*.f64 (sqrt.f64 (fma.f64 1/4 (*.f64 (/.f64 U J) (/.f64 U J)) 1)) (*.f64 J -2)): 0 points increase in error, 0 points decrease in error
      (*.f64 (sqrt.f64 (fma.f64 1/4 (Rewrite<= times-frac_binary64 (/.f64 (*.f64 U U) (*.f64 J J))) 1)) (*.f64 J -2)): 44 points increase in error, 0 points decrease in error
      (*.f64 (sqrt.f64 (fma.f64 1/4 (/.f64 (Rewrite<= unpow2_binary64 (pow.f64 U 2)) (*.f64 J J)) 1)) (*.f64 J -2)): 0 points increase in error, 0 points decrease in error
      (*.f64 (sqrt.f64 (fma.f64 1/4 (/.f64 (pow.f64 U 2) (Rewrite<= unpow2_binary64 (pow.f64 J 2))) 1)) (*.f64 J -2)): 0 points increase in error, 0 points decrease in error
      (*.f64 (sqrt.f64 (Rewrite<= fma-def_binary64 (+.f64 (*.f64 1/4 (/.f64 (pow.f64 U 2) (pow.f64 J 2))) 1))) (*.f64 J -2)): 0 points increase in error, 0 points decrease in error
      (*.f64 (sqrt.f64 (Rewrite<= +-commutative_binary64 (+.f64 1 (*.f64 1/4 (/.f64 (pow.f64 U 2) (pow.f64 J 2)))))) (*.f64 J -2)): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (sqrt.f64 (+.f64 1 (*.f64 1/4 (/.f64 (pow.f64 U 2) (pow.f64 J 2))))) J) -2)): 0 points increase in error, 0 points decrease in error
      (Rewrite<= *-commutative_binary64 (*.f64 -2 (*.f64 (sqrt.f64 (+.f64 1 (*.f64 1/4 (/.f64 (pow.f64 U 2) (pow.f64 J 2))))) J))): 0 points increase in error, 0 points decrease in error
    5. Taylor expanded in U around -inf 37.4

      \[\leadsto \color{blue}{U} \]

    if -1.05436127126935705e-266 < J < 1.0640764951653267e-249

    1. Initial program 43.5

      \[\left(\left(-2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)\right) \cdot \sqrt{1 + {\left(\frac{U}{\left(2 \cdot J\right) \cdot \cos \left(\frac{K}{2}\right)}\right)}^{2}} \]
    2. Simplified26.8

      \[\leadsto \color{blue}{J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot 2\right)}\right) \cdot \left(-2 \cdot \cos \left(\frac{K}{2}\right)\right)\right)} \]
      Proof
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (*.f64 J 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (*.f64 (cos.f64 (/.f64 K 2)) (Rewrite<= *-commutative_binary64 (*.f64 2 J))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (hypot.f64 1 (/.f64 U (Rewrite<= *-commutative_binary64 (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (Rewrite<= hypot-1-def_binary64 (sqrt.f64 (+.f64 1 (*.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))))))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 44 points increase in error, 0 points decrease in error
      (*.f64 J (*.f64 (sqrt.f64 (+.f64 1 (Rewrite<= unpow2_binary64 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))) (*.f64 -2 (cos.f64 (/.f64 K 2))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite=> *-commutative_binary64 (*.f64 (*.f64 -2 (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 J (Rewrite<= associate-*r*_binary64 (*.f64 -2 (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 J -2) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2)))))): 0 points increase in error, 0 points decrease in error
      (*.f64 (Rewrite<= *-commutative_binary64 (*.f64 -2 J)) (*.f64 (cos.f64 (/.f64 K 2)) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 0 points decrease in error
      (Rewrite<= associate-*l*_binary64 (*.f64 (*.f64 (*.f64 -2 J) (cos.f64 (/.f64 K 2))) (sqrt.f64 (+.f64 1 (pow.f64 (/.f64 U (*.f64 (*.f64 2 J) (cos.f64 (/.f64 K 2)))) 2))))): 0 points increase in error, 10 points decrease in error
    3. Taylor expanded in J around 0 32.7

      \[\leadsto \color{blue}{-1 \cdot U} \]
    4. Simplified32.7

      \[\leadsto \color{blue}{-U} \]
      Proof
      (neg.f64 U): 0 points increase in error, 0 points decrease in error
      (Rewrite<= mul-1-neg_binary64 (*.f64 -1 U)): 0 points increase in error, 0 points decrease in error
  3. Recombined 3 regimes into one program.
  4. Final simplification8.7

    \[\leadsto \begin{array}{l} \mathbf{if}\;J \leq -1.0377437032178969 \cdot 10^{-236}:\\ \;\;\;\;J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot 2\right)}\right) \cdot \left(\cos \left(\frac{K}{2}\right) \cdot -2\right)\right)\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U\\ \mathbf{elif}\;J \leq 1.0640764951653267 \cdot 10^{-249}:\\ \;\;\;\;-U\\ \mathbf{else}:\\ \;\;\;\;J \cdot \left(\mathsf{hypot}\left(1, \frac{U}{\cos \left(\frac{K}{2}\right) \cdot \left(J \cdot 2\right)}\right) \cdot \left(\cos \left(\frac{K}{2}\right) \cdot -2\right)\right)\\ \end{array} \]

Alternatives

Alternative 1
Error17.0
Cost20232
\[\begin{array}{l} t_0 := J \cdot \left(\left(\cos \left(\frac{K}{2}\right) \cdot -2\right) \cdot \mathsf{hypot}\left(1, \frac{U}{J \cdot 2}\right)\right)\\ \mathbf{if}\;J \leq -3.729554411415352 \cdot 10^{-159}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;\mathsf{fma}\left(2, \frac{J}{\frac{U}{J}} \cdot {\cos \left(K \cdot 0.5\right)}^{2}, U\right)\\ \mathbf{elif}\;J \leq 4.739875264948336 \cdot 10^{-235}:\\ \;\;\;\;-U\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]
Alternative 2
Error17.0
Cost14092
\[\begin{array}{l} t_0 := J \cdot \left(\left(\cos \left(\frac{K}{2}\right) \cdot -2\right) \cdot \mathsf{hypot}\left(1, \frac{U}{J \cdot 2}\right)\right)\\ \mathbf{if}\;J \leq -3.729554411415352 \cdot 10^{-159}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U + \left(J \cdot 2\right) \cdot \frac{J}{U}\\ \mathbf{elif}\;J \leq 4.739875264948336 \cdot 10^{-235}:\\ \;\;\;\;-U\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]
Alternative 3
Error26.6
Cost7508
\[\begin{array}{l} t_0 := J \cdot \left(-2 \cdot \cos \left(K \cdot 0.5\right)\right)\\ \mathbf{if}\;J \leq -0.00028224483445998095:\\ \;\;\;\;t_0\\ \mathbf{elif}\;J \leq -5.735573053561281 \cdot 10^{-129}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U + \left(J \cdot 2\right) \cdot \frac{J}{U}\\ \mathbf{elif}\;J \leq 7.994851098623693 \cdot 10^{-215}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq 7.367002668229626 \cdot 10^{-147}:\\ \;\;\;\;U\\ \mathbf{else}:\\ \;\;\;\;t_0\\ \end{array} \]
Alternative 4
Error38.6
Cost1236
\[\begin{array}{l} t_0 := U + \left(J \cdot 2\right) \cdot \frac{J}{U}\\ \mathbf{if}\;J \leq -8.183055114224356 \cdot 10^{+25}:\\ \;\;\;\;J \cdot -2\\ \mathbf{elif}\;J \leq -5.735573053561281 \cdot 10^{-129}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;t_0\\ \mathbf{elif}\;J \leq 7.994851098623693 \cdot 10^{-215}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq 9.719092662201594 \cdot 10^{+74}:\\ \;\;\;\;t_0\\ \mathbf{else}:\\ \;\;\;\;J \cdot -2\\ \end{array} \]
Alternative 5
Error38.6
Cost852
\[\begin{array}{l} \mathbf{if}\;J \leq -8.183055114224356 \cdot 10^{+25}:\\ \;\;\;\;J \cdot -2\\ \mathbf{elif}\;J \leq -5.735573053561281 \cdot 10^{-129}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U\\ \mathbf{elif}\;J \leq 7.994851098623693 \cdot 10^{-215}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq 9.719092662201594 \cdot 10^{+74}:\\ \;\;\;\;U\\ \mathbf{else}:\\ \;\;\;\;J \cdot -2\\ \end{array} \]
Alternative 6
Error46.9
Cost656
\[\begin{array}{l} \mathbf{if}\;J \leq -2.870821815076931 \cdot 10^{-23}:\\ \;\;\;\;U\\ \mathbf{elif}\;J \leq -5.735573053561281 \cdot 10^{-129}:\\ \;\;\;\;-U\\ \mathbf{elif}\;J \leq -1.054361271269357 \cdot 10^{-266}:\\ \;\;\;\;U\\ \mathbf{elif}\;J \leq 7.994851098623693 \cdot 10^{-215}:\\ \;\;\;\;-U\\ \mathbf{else}:\\ \;\;\;\;U\\ \end{array} \]
Alternative 7
Error46.8
Cost64
\[U \]

Error

Reproduce

herbie shell --seed 2022295 
(FPCore (J K U)
  :name "Maksimov and Kolovsky, Equation (3)"
  :precision binary64
  (* (* (* -2.0 J) (cos (/ K 2.0))) (sqrt (+ 1.0 (pow (/ U (* (* 2.0 J) (cos (/ K 2.0)))) 2.0)))))