{"id":944,"date":"2009-11-20T14:14:11","date_gmt":"2009-11-20T13:14:11","guid":{"rendered":"http:\/\/www.lumen.nu\/rekveld\/wp\/?p=944"},"modified":"2019-08-24T21:14:36","modified_gmt":"2019-08-24T20:14:36","slug":"halting-vs-dying","status":"publish","type":"post","link":"https:\/\/www.joostrekveld.net\/?p=944","title":{"rendered":"halting vs. dying"},"content":{"rendered":"<p>Between things I started rereading the great paper by Walter Fontana and Leo Buss about artificial chemistry. I read it a long time ago, but after having read Von Foerster, Maturana, Varela, Spencer-Brown, Rosen, Cariani, Kaufman (Louis) and Kauffman (Stuart), I now see that it is a lot more profound than I thought when first reading it. It now blows my mind, to be more exact, and actually refers to more than half of the people I just mentioned.<\/p>\n<p>Here a quote which resonates in very interesting ways with the authors mentioned above:<\/p>\n<p>&#8220;The world of functions and the world of processes emphasize the halting problem di\ufb00erently. While termination is a desideratum for functions or algorithms, the opposite is typically true for processes. There one looks for conditions under which a community of processes is guaranteed never to dead-lock, as there are many situations where ongoing communication or interactivity is required. Examples include operating systems, whether in air tra\ufb03c control systems, computer systems, mobile telephone networks, or&#8230;living and cognizing systems. The focus on the absence of dead-lock shifts the attention from computation to organization.&#8221;<\/p>\n<p><img decoding=\"async\" id=\"image945\" src=\"https:\/\/www.joostrekveld.net\/wp\/wp-content\/uploads\/2009\/11\/fontanabuss2.jpg\" alt=\"fontanabuss2.jpg\" \/><\/p>\n<p>The full reference is:<\/p>\n<p>Walter Fontana, Leo W. Buss, &#8220;The barrier of objects: From dynamical systems to bounded<br \/>\norganizations &#8220;, in: John Casti &amp; Anders Karlqvist, eds.,\u201cBoundaries and Barriers\u201d, Addison-Wesley, Reading MA, 1996, pp. 56\u2013116.<\/p>\n<p>there is an <a href=\"http:\/\/citeseerx.ist.psu.edu\/viewdoc\/download?doi=10.1.1.80.4620&amp;rep=rep1&amp;type=pdf\" target=\"_blank\" rel=\"noopener noreferrer\">online version<\/a> with extra appendices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Between things I started rereading the great paper by Walter Fontana and Leo Buss about artificial chemistry. I read it a long time ago, but after having read Von Foerster, Maturana, Varela, Spencer-Brown, Rosen, Cariani, Kaufman (Louis) and Kauffman (Stuart), I now see that it is a lot more profound than I thought when first &hellip; <a href=\"https:\/\/www.joostrekveld.net\/?p=944\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">halting vs. dying<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":945,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,8,12],"tags":[],"class_list":["post-944","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-books","category-umwelt","category-work"],"_links":{"self":[{"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/posts\/944","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=944"}],"version-history":[{"count":1,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/posts\/944\/revisions"}],"predecessor-version":[{"id":2477,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/posts\/944\/revisions\/2477"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=\/wp\/v2\/media\/945"}],"wp:attachment":[{"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=944"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=944"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.joostrekveld.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=944"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}