Screenshot instructions:
Windows
Mac
Red Hat Linux
Ubuntu
Click URL instructions:
Rightclick on ad, choose "Copy Link", then paste here →
(This may not be possible with some types of ads)
You can subscribe to this list here.
2002 
_{Jan}

_{Feb}

_{Mar}

_{Apr}

_{May}

_{Jun}
(67) 
_{Jul}
(61) 
_{Aug}
(49) 
_{Sep}
(43) 
_{Oct}
(59) 
_{Nov}
(24) 
_{Dec}
(18) 

2003 
_{Jan}
(34) 
_{Feb}
(35) 
_{Mar}
(72) 
_{Apr}
(42) 
_{May}
(46) 
_{Jun}
(15) 
_{Jul}
(64) 
_{Aug}
(62) 
_{Sep}
(22) 
_{Oct}
(41) 
_{Nov}
(57) 
_{Dec}
(56) 
2004 
_{Jan}
(48) 
_{Feb}
(47) 
_{Mar}
(33) 
_{Apr}
(39) 
_{May}
(6) 
_{Jun}
(17) 
_{Jul}
(19) 
_{Aug}
(10) 
_{Sep}
(14) 
_{Oct}
(74) 
_{Nov}
(80) 
_{Dec}
(22) 
2005 
_{Jan}
(43) 
_{Feb}
(33) 
_{Mar}
(52) 
_{Apr}
(74) 
_{May}
(32) 
_{Jun}
(58) 
_{Jul}
(18) 
_{Aug}
(41) 
_{Sep}
(71) 
_{Oct}
(28) 
_{Nov}
(65) 
_{Dec}
(68) 
2006 
_{Jan}
(54) 
_{Feb}
(37) 
_{Mar}
(82) 
_{Apr}
(211) 
_{May}
(69) 
_{Jun}
(75) 
_{Jul}
(279) 
_{Aug}
(139) 
_{Sep}
(135) 
_{Oct}
(58) 
_{Nov}
(81) 
_{Dec}
(78) 
2007 
_{Jan}
(141) 
_{Feb}
(134) 
_{Mar}
(65) 
_{Apr}
(49) 
_{May}
(61) 
_{Jun}
(90) 
_{Jul}
(72) 
_{Aug}
(53) 
_{Sep}
(86) 
_{Oct}
(61) 
_{Nov}
(62) 
_{Dec}
(101) 
2008 
_{Jan}
(100) 
_{Feb}
(66) 
_{Mar}
(76) 
_{Apr}
(95) 
_{May}
(77) 
_{Jun}
(93) 
_{Jul}
(103) 
_{Aug}
(76) 
_{Sep}
(42) 
_{Oct}
(55) 
_{Nov}
(44) 
_{Dec}
(75) 
2009 
_{Jan}
(103) 
_{Feb}
(105) 
_{Mar}
(121) 
_{Apr}
(59) 
_{May}
(103) 
_{Jun}
(82) 
_{Jul}
(67) 
_{Aug}
(76) 
_{Sep}
(85) 
_{Oct}
(75) 
_{Nov}
(181) 
_{Dec}
(133) 
2010 
_{Jan}
(107) 
_{Feb}
(116) 
_{Mar}
(145) 
_{Apr}
(89) 
_{May}
(138) 
_{Jun}
(85) 
_{Jul}
(82) 
_{Aug}
(111) 
_{Sep}
(70) 
_{Oct}
(83) 
_{Nov}
(60) 
_{Dec}
(16) 
2011 
_{Jan}
(61) 
_{Feb}
(16) 
_{Mar}
(52) 
_{Apr}
(41) 
_{May}
(34) 
_{Jun}
(41) 
_{Jul}
(57) 
_{Aug}
(73) 
_{Sep}
(21) 
_{Oct}
(45) 
_{Nov}
(50) 
_{Dec}
(28) 
2012 
_{Jan}
(70) 
_{Feb}
(36) 
_{Mar}
(71) 
_{Apr}
(29) 
_{May}
(48) 
_{Jun}
(61) 
_{Jul}
(44) 
_{Aug}
(54) 
_{Sep}
(20) 
_{Oct}
(28) 
_{Nov}
(41) 
_{Dec}
(137) 
2013 
_{Jan}
(62) 
_{Feb}
(55) 
_{Mar}
(31) 
_{Apr}
(23) 
_{May}
(54) 
_{Jun}
(54) 
_{Jul}
(90) 
_{Aug}
(46) 
_{Sep}
(38) 
_{Oct}
(60) 
_{Nov}
(92) 
_{Dec}
(17) 
2014 
_{Jan}
(62) 
_{Feb}
(35) 
_{Mar}
(72) 
_{Apr}
(30) 
_{May}
(97) 
_{Jun}
(81) 
_{Jul}
(63) 
_{Aug}
(64) 
_{Sep}
(28) 
_{Oct}
(45) 
_{Nov}
(48) 
_{Dec}
(109) 
2015 
_{Jan}
(106) 
_{Feb}
(36) 
_{Mar}
(65) 
_{Apr}
(63) 
_{May}
(95) 
_{Jun}
(56) 
_{Jul}
(48) 
_{Aug}
(55) 
_{Sep}
(100) 
_{Oct}
(57) 
_{Nov}
(33) 
_{Dec}
(46) 
2016 
_{Jan}
(76) 
_{Feb}
(53) 
_{Mar}
(88) 
_{Apr}
(79) 
_{May}
(62) 
_{Jun}
(65) 
_{Jul}
(37) 
_{Aug}
(23) 
_{Sep}
(108) 
_{Oct}
(68) 
_{Nov}
(66) 
_{Dec}
(47) 
2017 
_{Jan}
(55) 
_{Feb}
(11) 
_{Mar}
(30) 
_{Apr}
(19) 
_{May}
(14) 
_{Jun}
(21) 
_{Jul}
(30) 
_{Aug}
(48) 
_{Sep}
(39) 
_{Oct}
(30) 
_{Nov}
(75) 
_{Dec}
(28) 
2018 
_{Jan}
(70) 
_{Feb}

_{Mar}

_{Apr}
(1) 
_{May}

_{Jun}

_{Jul}

_{Aug}

_{Sep}

_{Oct}

_{Nov}

_{Dec}

S  M  T  W  T  F  S 



1
(2) 
2
(1) 
3
(5) 
4
(4) 
5
(2) 
6
(5) 
7
(2) 
8

9

10
(12) 
11

12
(3) 
13
(5) 
14

15
(4) 
16
(3) 
17

18
(1) 
19
(7) 
20

21
(3) 
22
(4) 
23
(2) 
24
(2) 
25
(2) 
26
(6) 
27
(2) 
28
(2) 
29
(4) 
30
(2) 



From: SourceForge.net <noreply@so...>  20090923 21:56:39

Bugs item #2864588, was opened at 20090922 23:24 Message generated for change (Settings changed) made by crategus You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2864588&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Lisp Core  Integration Group: None >Status: Closed >Resolution: Fixed Priority: 5 Private: No Submitted By: Dieter Kaiser (crategus) Assigned to: Nobody/Anonymous (nobody) Summary: specint(exp(s*t)*bessel_i(1/2,t)^2,t) not correct Initial Comment: I think we have some problems with the Laplace transform of Bessel functions with a half integral index. This is an example for the square of the bessel_i(1/2,t) function: (%i1) assume(s>0)$ We do the Laplace transform for the square of the expanded bessel_i(1/2,t) function and use the algorithm for the sinh function to get the Laplace transform: (%i2) expr1:bessel_i(1/2,t)^2,besselexpand:true; (%o2) 2*sinh(t)^2/(%pi*t) (%i3) specint(exp(s*t)*expr1,t); (%o3) log(14/s^2)/(2*%pi) Aagain, but we do not expand the function. Now, the hypergeometric algorithm is used. (%i4) expr2:bessel_i(1/2,t)^2; (%o4) bessel_i(1/2,t)^2 (%i5) specint(exp(s*t)*expr2,t); (%o5) (%i1)*%i*log(14/s^2)/(2^(3/2)*%pi) The answers differ by a factor sqrt(%i). First the ratio of the two answers: (%i17) specint(exp(s*t)*expr1,t)/specint(exp(s*t)*expr2,t); (%o17) sqrt(2)*%i/(%i1) The ratio differs by a factor sqrt(%i): (%i18) rectform(sqrt(%i)*%); (%o18) 1 I think we have more of such problems with the Laplace transform of Bessel functions. There is one expected failure for the Laplace transform of bessel_y(1/2,sqrt(t))^2 in the testfile rtest14.mac which might be related to this problem. I had already a long search to find the bug, but had no success. Perhaps it is a mathematical problem related to the hypergeometric transformation and integration for a half integral index. Dieter Kaiser  >Comment By: Dieter Kaiser (crategus) Date: 20090923 23:56 Message: The problem for bessel_i(1/2,t)^2 is fixed in hypgeo.lisp revsion 1.62. The problem for bessel_y(1/2,sqrt(t)) is still open. But it is another bug. Closing this bug report. Dieter Kaiser  Comment By: Dieter Kaiser (crategus) Date: 20090923 00:37 Message: I have found the bug for the square of the Bessel I function. We transform to two Bessel J functions. In the transformation is missing a factor %i^v. (In the following code I have already replaced the function 1fact and have inserted the powers of %i). ;; Laplace transform of square of Bessel I function (cond ((setq l (onei^2 u)) (setq index1 (cdras 'v l) arg1 (mul '$%i (cdras 'w l)) rest (mul (power '$%i (neg index1)) (power '$%i (neg index1)) ; the missing factor (cdras 'u l))) (return (lt1j^2 rest arg1 index1)))) Now we get: (%i3) assume(s>0)$ We expand the Bessel function: (%i4) specint(exp(s*t)*bessel_i(1/2,t)^2,t),besselexpand:true; (%o4) log(14/s^2)/(2*%pi) Now we use the hypergeometric code and get the same result: (%i5) specint(exp(s*t)*bessel_i(1/2,t)^2,t); (%o5) log(14/s^2)/(2*%pi) Dieter Kaiser  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2864588&group_id=4933 
From: SourceForge.net <noreply@so...>  20090923 20:44:41

Bugs item #2865255, was opened at 20090923 16:44 Message generated for change (Tracker Item Submitted) made by dsimcha You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2865255&group_id=4933 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: dsimcha (dsimcha) Assigned to: Nobody/Anonymous (nobody) Summary: Can't do ilt(1 / (s + a)^n, s, t) In Proper Environment Initial Comment: What actually happens: (%i1) assume(n > 0); (%o1) [n > 0] (%i2) declare(n, integer); (%o2) done (%i3) ilt( 1 / (s + a)^n, s, t); 1 (%o3) ilt(, s, t) n (s + a) Expected answer (Not necessarily in this form) : t^(n  1) exp(a * t) / (t  1)!  You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=104933&aid=2865255&group_id=4933 