{"id":119,"date":"2008-06-17T17:07:04","date_gmt":"2008-06-17T16:07:04","guid":{"rendered":"http:\/\/www.walkingrandomly.com\/?p=119"},"modified":"2008-06-18T12:16:27","modified_gmt":"2008-06-18T11:16:27","slug":"mathcad-14-calculation-bug-when-evaluating-231","status":"publish","type":"post","link":"https:\/\/walkingrandomly.com\/?p=119","title":{"rendered":"Mathcad 14 calculation bug when evaluating 2^31"},"content":{"rendered":"

Some people collect stamps, some collect coins. I collect bugs in computer algebra systems and this is a particularly amusing one in my opinion. If you evaluate 2^31 using Mathcad’s symbolic engine in version 14 then you get a negative result! It comes up with the following<\/p>\n

2^31-> -2147 483648<\/p>\n

Note the negative sign! No computer algebra system is perfect but it is not often that you get a bug from such an elementary calculation – shame on you Mathcad! At least it gets the right result if you use its numerical engine<\/p>\n

2^31 = 2.147 *10^9<\/p>\n

Hopefully PTC<\/a> will be releasing a bug fix soon.<\/p>\n","protected":false},"excerpt":{"rendered":"

Some people collect stamps, some collect coins. I collect bugs in computer algebra systems and this is a particularly amusing one in my opinion. If you evaluate 2^31 using Mathcad’s symbolic engine in version 14 then you get a negative result! It comes up with the following 2^31-> -2147 483648 Note the negative sign! No […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6,4,17],"tags":[],"class_list":["post-119","post","type-post","status-publish","format-standard","hentry","category-general-math","category-math-software","category-mathcad"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p3swhs-1V","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/119","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=119"}],"version-history":[{"count":0,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=\/wp\/v2\/posts\/119\/revisions"}],"wp:attachment":[{"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/walkingrandomly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}