tag:blogger.com,1999:blog-4902912149165842709.comments2023-12-17T02:37:41.147-08:00Brian Borchers BlogBrian Borchershttp://www.blogger.com/profile/18216044824246034466noreply@blogger.comBlogger17125tag:blogger.com,1999:blog-4902912149165842709.post-1321711938716657252022-02-21T10:43:54.626-08:002022-02-21T10:43:54.626-08:00Unlike the other commenters, I'm an actual hum...Unlike the other commenters, I'm an actual human being. Many thanks for this, and for the links! I have both a 36xPro and a 30XIIS, and I'm fascinated to see they're not just IEEE-754, though it makes sense, they're probably trying to keep their transistor count as low as possible.John Clementshttps://www.blogger.com/profile/15701081040575095781noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-52253072438296695222021-10-04T23:19:05.014-07:002021-10-04T23:19:05.014-07:00This comment has been removed by the author.Jashikhttps://www.blogger.com/profile/06077585570666046625noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-82986693136847427122020-03-29T03:50:32.644-07:002020-03-29T03:50:32.644-07:00Dear Brian, have you had a chance to test your cod...Dear Brian, have you had a chance to test your code on a Tesla/Radeon Instinct GPUs? And if so, could this give CSDP a significant speed-up?<br /><br />Best wishes, JanAnonymoushttps://www.blogger.com/profile/09665679529486185143noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-65948288010149230862019-11-08T02:09:27.977-08:002019-11-08T02:09:27.977-08:00I am really enjoying reading your well written art...I am really enjoying reading your well written articles. It looks like you spend a lot of effort and time on your blog. I have bookmarked it and I am looking forward to reading new articles. Keep up the good work. <a href="https://play.google.com/store/apps/details?id=com.osthoro.scientificcalculator" rel="nofollow">science</a><br />ABhttps://www.blogger.com/profile/17062521498551331545noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-79144378807481692302019-11-08T02:08:16.654-08:002019-11-08T02:08:16.654-08:00I feel very grateful that I read this. It is very ...I feel very grateful that I read this. It is very helpful and very informative and I really learned a lot from it. <a href="https://play.google.com/store/apps/details?id=com.osthoro.scientificcalculator" rel="nofollow">calculator</a><br />ABhttps://www.blogger.com/profile/17062521498551331545noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-79623716957709548932019-11-08T02:06:13.593-08:002019-11-08T02:06:13.593-08:00I like viewing web sites which comprehend the pric...I like viewing web sites which comprehend the price of delivering the excellent useful resource free of charge. I truly adored reading your posting. Thank you! <a href="https://play.google.com/store/apps/details?id=com.osthoro.scientificcalculator" rel="nofollow">science</a><br />ABhttps://www.blogger.com/profile/17062521498551331545noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-61136529363994846702019-10-23T04:33:24.844-07:002019-10-23T04:33:24.844-07:00It is especially decent, though look into the tips...It is especially decent, though look into the tips during this home address. <a href="https://www.rocknets.com/converter/length/cm-to-inches-converter.php" rel="nofollow">centimeters to inches</a><br />123456789https://www.blogger.com/profile/07610450962256030478noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-11716543479713799192017-12-29T20:39:04.668-08:002017-12-29T20:39:04.668-08:00A bit more research shows that
4.999999999 + 1....A bit more research shows that <br /> <br />4.999999999 + 1.0E-12 - 4.999999 - 9.99E-7=1.0E-12<br /><br />This tells me that that the 1.0E-12 made it through the first addition correctly. <br /><br />This was all very mysterious, until I found the following quote:<br /><br />"If a and b are floating point numbers that differ by less than one unit in the second least significant digit of max(|a|, |b|), (i.e., one unit the thirteenth, base 10, significant digit), then a − b is set to zero."<br /><br />in a discussion of TI-83 rounding at <br /> <br />http://people.ku.edu/~wzhuang/CAMseminar/CAM06Fall/DirtySecrets.pdf<br /><br />The document makes some suggestions about why this feature might have been added by TI that sound reasonable. It appears that the TI calculators in my collection all have this feature. <br /><br />Furthermore, the Casio FX-115ES PLUS that I tested has a similar feature, <br /> <br />4.999999999 + 1.0E-12 - 4.999999999 = 1.0E-12<br />4.999999999 + 1.0E-13 - 4.999999999 = 0.0E+00<br />4.999999999 + 1.0E-13 - 4.999999 - 9.99E-7 = 1.0E-13<br /><br />Brian Borchershttps://www.blogger.com/profile/18216044824246034466noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-31995751632506949792017-12-29T20:07:16.122-08:002017-12-29T20:07:16.122-08:00The TI-30XIIS displays some weird behavior that I ...The TI-30XIIS displays some weird behavior that I can't explain:<br /> <br />1.123456789+1.2345E-10-1.123456789=1.235E-10<br /> <br />This is what I would expect from 14 digit arithmetic with R5UP rounding. <br /><br />5.0+1E-11-5.0=1E-11<br />5.0+1E-12-5.0=0.0E+00<br /><br />Here, the intermediate results seem to have been rounded to 12 digits rather than 14 digits! <br /><br />Also, <br /><br />4.999999999 + 1.0E-10 - 4.999999999=1.0E-10 <br />4.999999999 + 1.0E-11 - 4.999999999=1.0E-11<br />4.999999999 + 1.0E-12 - 4.999999999=0.0E+00<br /><br />This also seems to be rounded to 12 digits correctly. <br /><br />However, <br /> <br />4.999999999 + 1.2345E-10 - 4.999999999 = 1.235E-10<br /><br />which again looks like 14 digit arithmetic. <br /><br />It appears that the TI calculator is capable of 14 digits, but either rounds results to 12 digits in some cases, or simply doesn't do the addition if the smaller term has 0's in the first 12 positions. <br /><br />Brian Borchershttps://www.blogger.com/profile/18216044824246034466noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-24255168465099565932015-07-05T21:33:31.407-07:002015-07-05T21:33:31.407-07:00Sadly, recent changes to Google Scholar have broke...Sadly, recent changes to Google Scholar have broken this script. The new version of the Google Scholar page no longer uses the Charts API but seems to use Custom HTML instead. Since it's now possible to get the numbers by mousing over bars in the chart, I don't think that I'll bother to rewrite the script. Brian Borchershttps://www.blogger.com/profile/18216044824246034466noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-80951795163977832352013-02-10T02:07:26.890-08:002013-02-10T02:07:26.890-08:00I also participated in the course and totally agre...I also participated in the course and totally agree. Thanks for sharing your ideas on OER related to MOOCs, I had not thought of this connection before. <br /><br />If you're interested in my opinion to the course, maybe Google can help you translate my blog posts about it:<br /><br />http://www.olivertacke.de/2013/01/07/xmooc-im-selbstversuch-rechnergestutzte-datenanalyse/<br /><br />http://www.olivertacke.de/2013/01/17/xmooc-im-selbstversuch-halbzeit/<br /><br />http://www.olivertacke.de/2013/02/08/xmooc-im-selbstversuch-der-abschluss/Anonymoushttps://www.blogger.com/profile/10949225879987833919noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-81944259931690639662013-02-09T11:13:04.232-08:002013-02-09T11:13:04.232-08:00OK, but then is there anything that goes on in the...OK, but then is there anything that goes on in the Data Analysis course that requires everyone to take the course at the same pace? I believe that it's taught using the same structure of automatically graded quizzes and assignments. Brian Borchershttps://www.blogger.com/profile/18216044824246034466noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-50198249307107886722013-02-09T06:05:11.419-08:002013-02-09T06:05:11.419-08:00I believe the course you chose to review was not a...I believe the course you chose to review was not a good example since my understanding was that it was really a prep course for the Data Analysis course that required R programming. <br />The rigid schedule was to ensure students would complete the prep before the follow on course began.<br />I agree that these courses would improve if they were opened but really considering how far we have come in such a short time it is hard to fault the system.<br />DMH Jrhttps://www.blogger.com/profile/01911582298882970080noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-87195211864163672642011-04-29T21:28:23.130-07:002011-04-29T21:28:23.130-07:00It was really fun to go through your blog. As an o...It was really fun to go through your blog. As an optimizer I am delighted to find an optimization blog. I am also delighted that you chose to state the now famous statement of Terry Rockafellar. In fact in 1994 when I was a graduate student I was supposed to work in functional analysis. However my supervisor wanted me to work in fixed point theory and I was not finding much interest in it. Then one day my supervisor got this SIAM Review paper of Terry Rockafellar and he said he is giving me a last chance to start looking into a new subject. If I cant do anything here then I am really not fit to be a graduate paper. However that paper got me hooked to optimization for life. Though I did not understand the complete paper then since it involves really advanced nonsmooth analysis I used it to write a paper after ten years of hard work. This paper titled : Revisiting the Lagrange Multipliers Rule" (2006, Pacific Journal of Optimization)is essentially an ode to the 1993 paper of Terry Rockafellar. I do believe the every optimizer should at least take a look at this famous 1993 paper of Terry Rockafellar.<br /><br />Joydeep Dutta<br />Indian Institute of Technology,<br />KanpurJoydeephttps://www.blogger.com/profile/15249569433724049699noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-43735903712944083852011-02-15T02:32:40.933-08:002011-02-15T02:32:40.933-08:00You got it working! - You forgot to mention the be...You got it working! - You forgot to mention the best browser of them all, Opera. You don't know what you are missing.nilo de roockhttps://www.blogger.com/profile/15332190734914631351noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-45983597355097252232011-01-03T06:33:02.201-08:002011-01-03T06:33:02.201-08:00@Matt; Convex optimization is one of those enablin...@Matt; Convex optimization is one of those enabling technologies that makes lots of interesting applications possible. By itself, you might not find it to be very interesting. <br /><br />One of the most interesting areas of application of this stuff is in medical imaging- it's made possible dramatic improvements in the speed of MRI imaging.Brian Borchershttps://www.blogger.com/profile/18216044824246034466noreply@blogger.comtag:blogger.com,1999:blog-4902912149165842709.post-54217093404253850322011-01-03T00:19:42.504-08:002011-01-03T00:19:42.504-08:00Must go to wikipedia and read about convex optimiz...Must go to wikipedia and read about convex optimization...Anonymoushttps://www.blogger.com/profile/01374985372146021465noreply@blogger.com