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- Log ----------------------------------------------------------------- commit f8943af6bff60e23d679089db5207b4834aa83ff Author: Raymond Toy rtoy@google.com Date: Mon Apr 9 08:55:27 2012 -0700

Fix two typos in the names of tests.

diff --git a/rt-tests.lisp b/rt-tests.lisp index 915f808..0544ea8 100644 --- a/rt-tests.lisp +++ b/rt-tests.lisp @@ -908,7 +908,7 @@ (check-accuracy 50 val 0d0)) nil)

-(rt:deftest oct.jacobi-sn.1q +(rt:deftest oct.jacobi-cn.1q (let* ((ek (elliptic-k #q.5)) (val (jacobi-cn ek #q.5))) (check-accuracy 210 val #q0)) @@ -1179,7 +1179,7 @@ for m = (random #q1) for t3 = (elliptic-theta-3 0 (elliptic-nome m)) for true = (sqrt (/ (* 2 (elliptic-k m)) (float-pi m))) - for result = (check-accuracy 206 t3 true) + for result = (check-accuracy 205.7 t3 true) when result append (list (list (list k m) result))) nil) @@ -1411,7 +1411,7 @@ (check-accuracy 49.8 p true)) nil)

-(rt:deftest psi.2d +(rt:deftest psi.2q (let* ((z (float 4/3 #q1)) (p (psi z)) (true (- 3

commit cb1a5d41baf9d4db12a2563a230d0a1e55c8adea Author: Raymond Toy rtoy@google.com Date: Mon Apr 9 08:52:08 2012 -0700

Fix some mistakes in exp-integral-e when changing algorithm to use series.

diff --git a/qd-gamma.lisp b/qd-gamma.lisp index fe79813..25fa38e 100644 --- a/qd-gamma.lisp +++ b/qd-gamma.lisp @@ -532,36 +532,21 @@ ;; for |arg(z)| < pi. ;; ;; - (let* ((prec (float-contagion v z)) - (v (apply-contagion v prec)) - (z (apply-contagion z prec))) + (with-floating-point-contagion (v z) (cond ((and (realp v) (minusp v)) ;; E(-v, z) = z^(-v-1)*incomplete_gamma_tail(v+1,z) (let ((-v (- v))) (* (expt z (- v 1)) (incomplete-gamma-tail (+ -v 1) z)))) - ((< (abs z) 1) - ;; Use series for small z + ((or (< (abs z) 1) (>= (abs (phase z)) 3.1)) + ;; Use series for small z or if z is near the negative real + ;; axis because the continued fraction does not converge on + ;; the negative axis and converges slowly near the negative + ;; axis. (s-exp-integral-e v z)) - ((>= (abs (phase z)) 3.1) - ;; The continued fraction doesn't converge on the negative - ;; real axis, and converges very slowly near the negative - ;; real axis, so use the incomplete-gamma-tail function in - ;; this region. "Closeness" to the negative real axis is - ;; teken to mean that z is in a sector near the axis. - ;; - ;; E(v,z) = z^(v-1)*incomplete_gamma_tail(1-v,z) - (* (expt z (- v 1)) - (incomplete-gamma-tail (+ -v 1) z)))) - ((or (< (abs z) 1) (>= (abs (phase z)) 3.1)) - ;; Use series for small z or if z is near the negative real - ;; axis because the continued fraction does not converge on - ;; the negative axis and converges slowly near the negative - ;; axis. - (s-exp-integral-e v z)) - (t - ;; Use continued fraction for everything else. - (cf-exp-integral-e v z)))) + (t + ;; Use continued fraction for everything else. + (cf-exp-integral-e v z)))))

;; Series for Fresnel S ;;

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Summary of changes: qd-gamma.lisp | 33 +++++++++------------------------ rt-tests.lisp | 6 +++--- 2 files changed, 12 insertions(+), 27 deletions(-)

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