


Bits error versus d



Bits error versus h



Bits error versus l



Bits error versus M



Bits error versus D
Results
if l < -3.519360298233161e+217Initial program 31.6
rmApplied associate-*r/33.4
Taylor expanded around -inf 29.2
Simplified26.4
if -3.519360298233161e+217 < l < 2.898584392085e-311Initial program 24.5
rmApplied associate-*r/23.0
Taylor expanded around -inf 20.8
Simplified17.3
if 2.898584392085e-311 < l Initial program 25.4
rmApplied associate-*r/24.6
rmApplied pow124.6
Applied pow124.6
Applied pow-prod-down24.6
Simplified24.3
rmApplied associate-/l/22.9
rmApplied sqrt-div16.4
Applied sqrt-div10.3
Applied frac-times10.3
Applied associate-*r/10.1
Final simplification14.7
herbie shell --seed 2019016
(FPCore (d h l M D)
:name "Henrywood and Agarwal, Equation (12)"
(* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))))
Time bar (total: 1.2m)Debug log
| 1729× | (pre true 80) |
| 1314× | (body nan 80) |
| 415× | (body real 80) |
| 151.0ms | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))) |
1 alts after pruning (1 fresh and 0 done)
Merged error: 26.8b
Found 4 expressions with local error:
| 13.7b | (pow (/ d h) (/ 1 2)) |
| 13.6b | (pow (/ d l) (/ 1 2)) |
| 10.9b | (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)) |
| 9.0b | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))) |
| 43× | add-exp-log |
| 28× | prod-exp |
| 14× | add-cbrt-cube |
| 10× | add-cube-cbrt |
| 10× | pow-exp |
| 10× | *-un-lft-identity |
| 10× | pow1 |
| 10× | add-sqr-sqrt |
| 9× | pow-to-exp |
| 8× | unpow-prod-down |
| 8× | pow-unpow |
| 7× | associate-*r* |
| 6× | cbrt-unprod |
| 5× | div-inv |
| 4× | add-log-exp |
| 3× | associate-*r/ |
| 3× | associate-*l/ |
| 2× | *-commutative |
| 2× | pow-prod-down |
| 2× | associate-*l* |
| 2× | distribute-lft-in |
| 2× | pow-pow |
| 2× | sub-neg |
| 2× | distribute-rgt-in |
| 1× | flip-- |
| 1× | div-exp |
| 1× | flip3-- |
| 1× | frac-times |
| 29.0ms | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))) |
| 29.0ms | (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)) |
| 3.0ms | (pow (/ d l) (/ 1 2)) |
| 2.0ms | (pow (/ d h) (/ 1 2)) |
| 241.0ms | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))) |
| 87.0ms | (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)) |
| 83.0ms | (pow (/ d l) (/ 1 2)) |
| 83.0ms | (pow (/ d h) (/ 1 2)) |
| 668.0ms | (* (* 1 (pow (/ (* M D) (* 2 d)) 2)) h) |
| 419.0ms | (* (* (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2))) (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2))) (* (* (/ h l) (/ h l)) (/ h l))) |
| 396.0ms | (+ (+ (log (/ 1 2)) (log (pow (/ (* M D) (* 2 d)) 2))) (log (/ h l))) |
| 213.0ms | (* (* (* (* (pow (/ d h) (/ 1 2)) (pow (/ d h) (/ 1 2))) (pow (/ d h) (/ 1 2))) (* (* (pow (/ d l) (/ 1 2)) (pow (/ d l) (/ 1 2))) (pow (/ d l) (/ 1 2)))) (* (* (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)))) (- 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l))))) |
| 212.0ms | (+ (* 1 1) (+ (* (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l)) (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l))) (* 1 (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) (/ h l))))) |
18 alts after pruning (18 fresh and 0 done)
Merged error: 13.7b
Found 4 expressions with local error:
| 13.7b | (pow (/ d h) (/ 1 2)) |
| 13.6b | (pow (/ d l) (/ 1 2)) |
| 9.0b | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l))) |
| 6.0b | (/ (* M D) (* 2 d)) |
| 31× | add-exp-log |
| 19× | prod-exp |
| 11× | add-cbrt-cube |
| 9× | add-cube-cbrt |
| 9× | *-un-lft-identity |
| 9× | add-sqr-sqrt |
| 8× | pow-exp |
| 8× | unpow-prod-down |
| 8× | pow-unpow |
| 8× | pow1 |
| 8× | pow-to-exp |
| 5× | div-inv |
| 4× | add-log-exp |
| 3× | cbrt-unprod |
| 3× | associate-*r* |
| 2× | associate-*r/ |
| 2× | distribute-lft-in |
| 2× | pow-pow |
| 2× | sub-neg |
| 2× | distribute-rgt-in |
| 1× | associate-/l* |
| 1× | flip-- |
| 1× | *-commutative |
| 1× | pow-prod-down |
| 1× | associate-*l* |
| 1× | div-exp |
| 1× | flip3-- |
| 1× | times-frac |
| 1× | frac-2neg |
| 1× | associate-/r* |
| 1× | clear-num |
| 1× | cbrt-undiv |
| 32.0ms | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l))) |
| 5.0ms | (/ (* M D) (* 2 d)) |
| 3.0ms | (pow (/ d h) (/ 1 2)) |
| 3.0ms | (pow (/ d l) (/ 1 2)) |
| 248.0ms | (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l))) |
| 86.0ms | (pow (/ d h) (/ 1 2)) |
| 78.0ms | (pow (/ d l) (/ 1 2)) |
| 23.0ms | (/ (* M D) (* 2 d)) |
| 205.0ms | (* (* (* (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2))) (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2)))) (* (pow (/ d h) (/ 1 2)) (pow (/ d l) (/ 1 2)))) (* (* (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)) (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l))) (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)))) |
| 194.0ms | (+ (* 1 1) (+ (* (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l) (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)) (* 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)))) |
| 190.0ms | (+ (+ (* (log (/ d h)) (/ 1 2)) (* (log (/ d l)) (/ 1 2))) (log (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)))) |
| 186.0ms | (+ (+ (log (pow (/ d h) (/ 1 2))) (* (log (/ d l)) (/ 1 2))) (log (- 1 (/ (* (* (/ 1 2) (pow (/ (* M D) (* 2 d)) 2)) h) l)))) |
| 185.0ms | (exp (* 1/2 (- (log (/ 1 l)) (log (/ 1 d))))) |
16 alts after pruning (16 fresh and 0 done)
Merged error: 12.0b
Found 4 expressions with local error:
| 13.7b | (sqrt (/ d h)) |
| 13.6b | (sqrt (/ d l)) |
| 9.2b | (/ (/ (* l 2) h) (* (/ M 2) (/ D d))) |
| 9.0b | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 14× | add-exp-log |
| 14× | sqrt-div |
| 14× | add-cbrt-cube |
| 11× | add-sqr-sqrt |
| 10× | frac-times |
| 9× | add-cube-cbrt |
| 9× | *-un-lft-identity |
| 9× | pow1 |
| 8× | sqrt-prod |
| 7× | associate-*r/ |
| 6× | associate-*l/ |
| 5× | div-inv |
| 4× | add-log-exp |
| 4× | associate-/l* |
| 4× | flip-- |
| 4× | cbrt-unprod |
| 4× | prod-exp |
| 4× | flip3-- |
| 4× | times-frac |
| 3× | associate-/r/ |
| 3× | pow-prod-down |
| 3× | associate-*l* |
| 2× | div-exp |
| 2× | pow1/2 |
| 2× | rem-sqrt-square |
| 2× | cbrt-undiv |
| 1× | associate-/l/ |
| 1× | *-commutative |
| 1× | associate-*r* |
| 1× | frac-2neg |
| 1× | associate-/r* |
| 1× | clear-num |
| 29.0ms | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 12.0ms | (/ (/ (* l 2) h) (* (/ M 2) (/ D d))) |
| 1.0ms | (sqrt (/ d h)) |
| 1.0ms | (sqrt (/ d l)) |
| 232.0ms | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 48.0ms | (/ (/ (* l 2) h) (* (/ M 2) (/ D d))) |
| 34.0ms | (sqrt (/ d l)) |
| 24.0ms | (sqrt (/ d h)) |
| 545.0ms | (* (- (* 1 1) (* (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d)))) (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d)))))) (* (sqrt (/ d l)) (sqrt d))) |
| 431.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d)))) (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))))) (* (sqrt l) (sqrt h))) |
| 404.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d)))) (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))))) (sqrt l)) |
| 375.0ms | (* 4 (/ (* l d) (* h (* M D)))) |
| 356.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d)))) (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (/ (* l 2) h) (* (/ M 2) (/ D d))))))) (sqrt h)) |
19 alts after pruning (19 fresh and 0 done)
Merged error: 9.3b
Found 4 expressions with local error:
| 13.7b | (sqrt (/ d h)) |
| 13.6b | (sqrt (/ d l)) |
| 9.0b | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 6.5b | (/ (* l 2) (* (* (/ M 2) (/ D d)) h)) |
| 14× | sqrt-div |
| 11× | add-exp-log |
| 11× | add-cbrt-cube |
| 10× | frac-times |
| 9× | associate-*l/ |
| 9× | pow1 |
| 9× | add-sqr-sqrt |
| 8× | sqrt-prod |
| 7× | add-cube-cbrt |
| 7× | associate-*r/ |
| 7× | *-un-lft-identity |
| 4× | add-log-exp |
| 4× | flip-- |
| 4× | flip3-- |
| 3× | div-inv |
| 3× | cbrt-unprod |
| 3× | associate-/r/ |
| 3× | prod-exp |
| 3× | pow-prod-down |
| 3× | associate-*l* |
| 2× | pow1/2 |
| 2× | rem-sqrt-square |
| 1× | associate-/l* |
| 1× | *-commutative |
| 1× | associate-*r* |
| 1× | div-exp |
| 1× | times-frac |
| 1× | frac-2neg |
| 1× | associate-/r* |
| 1× | clear-num |
| 1× | cbrt-undiv |
| 19.0ms | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 8.0ms | (/ (* l 2) (* (* (/ M 2) (/ D d)) h)) |
| 1.0ms | (sqrt (/ d h)) |
| 0.0ms | (sqrt (/ d l)) |
| 185.0ms | (* (- 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* (sqrt (/ d l)) (sqrt (/ d h)))) |
| 68.0ms | (/ (* l 2) (* (* (/ M 2) (/ D d)) h)) |
| 36.0ms | (sqrt (/ d h)) |
| 30.0ms | (sqrt (/ d l)) |
| 667.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h))) (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))))) (sqrt h)) |
| 656.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h))) (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))))) (* (sqrt l) (sqrt h))) |
| 580.0ms | (* (+ (* 1 1) (+ (* (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h))) (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))) (* 1 (/ (* (/ M 2) (/ D d)) (/ (* l 2) (* (* (/ M 2) (/ D d)) h)))))) (sqrt l)) |
| 422.0ms | (* 4 (/ (* l d) (* h (* M D)))) |
| 419.0ms | (* 4 (/ (* l d) (* h (* M D)))) |
19 alts after pruning (19 fresh and 0 done)
Merged error: 8.8b
57.5% (6.6b remaining)
Error of 14.7b against oracle of 8.1b and baseline of 23.6b
| 51895× | (pre true 80) |
| 39082× | (body nan 80) |
| 12813× | (body real 80) |