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geo3954 (22) 7 Articles, 15 Replies, 22 Points
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Since 5/3/2012 7:56:23 AM, geo3954 has written 7 articles and participated in 15 conversations.
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geo3954

geo3954's articles:
 Items(7) /1 automatic acceptance of subscripts/superscripts. 1 33 (1/26/2008 5:59:15 PM) comp.text.texThe most frequent mistakes I make when entering TeX instructions are of this type: entering x_13 rather than x_{13} or y^23 rather than y^{23} Are there any easy fixes that would provide automatic acceptance...George Fortran and C: United with a KISS 7 107 (6/23/2007 7:10:23 PM) comp.lang.fortranI have recently posed questions to this group: Form t = a*x+c in 64 bits, get top and bottom 32 bits of t Form k = i + j and test for overflow Such problems arise in certain kinds of random number generation--...George Form k = i + j and test for overflow. 109 59 (6/18/2007 8:45:17 PM) comp.lang.fortranMy recent query on use of Fortran to carry out the essential operation for multiply-with-carry: Form t = a*x+c in 64 bits, get top and bottom 32 bits of t led to a number of interesting responses, and my co...George Form t=a*x+c in 64 bits, get top and bottom 32 bits of t. 37 44 (6/14/2007 3:02:54 PM) comp.lang.fortranAssembler instructions for most CPUs permit forming the 64-bit product of two 32-bit integers, then access to the top and bottom parts. Such operations provide the essentials for a class of random number gener...George Help changing an old postscript plot. 3 45 (7/13/2004 7:01:44 PM) comp.lang.postscriptI have postscript file containing four plots, the sources of which are no longer available. One of the four plots has a legend: 4. Relative error, Hart, Cody and AS66. which I must change to 4. ...George Creating and writing to files "on the fly" 2 37 (8/3/2003 2:46:24 PM) comp.lang.cI have a set of, say, 2000 points in the 8-dimensional simplex S={(x_1,x_2,...,x_8),x_1+x_2+...+x_8=1, x's>=0}. To help analyze that 8-dimensional set, I wish to project the set of points onto each of the...George Assigning unsigned long to unsigned long long 1 56 (7/8/2003 4:49:43 PM) comp.lang.cThe essence of a multiply-with-carry RNG is to have declarations in the RNG proc, such as unsigned long mwc( ){ static unsigned long x = 123456789, c = 362436; unsigned long long t, a = 916905990LL...George

geo3954's replies:
 Items(6) /1 When (32-bit) double precision isn't precise enough 5 32 (9/10/2003 5:21:29 PM) comp.lang.c I've been trying to perform a calculation that has been running into an underflow (insufficient precision) problem in Microsoft Excel, which calculates using at most 15 significant digits. For this purpose... 'erf' function in C 26 50 (2/14/2004 11:39:40 PM) comp.lang.cHi, Are there any C compilers which have the erf function (from probability) as part of their math libraries? Or are there any math libraries available to download which implement this function? ...jph500 (1) Form t=a*x+c in 64 bits, get top and bottom 32 bits of t. 37 44 (6/14/2007 3:02:54 PM) comp.lang.fortranAssembler instructions for most CPUs permit forming the 64-bit product of two 32-bit integers, then access to the top and bottom parts. Such operations provide the essentials for a class of random number gener...geo3954 (22) Form k = i + j and test for overflow. 109 59 (6/18/2007 8:45:17 PM) comp.lang.fortranMy recent query on use of Fortran to carry out the essential operation for multiply-with-carry: Form t = a*x+c in 64 bits, get top and bottom 32 bits of t led to a number of interesting responses, and my co...geo3954 (22) Fortran and C: United with a KISS 7 107 (6/23/2007 7:10:23 PM) comp.lang.fortranI have recently posed questions to this group: Form t = a*x+c in 64 bits, get top and bottom 32 bits of t Form k = i + j and test for overflow Such problems arise in certain kinds of random number generation--...geo3954 (22) simple PRNG? 75 118 (3/21/2008 6:00:09 AM) comp.lang.cCan anyone point me to a simple, fast RRNG function to generate random ints within a specified range? It is important that each value within the range has the same probability (uniform distribution). I do not...copx (116)