Categoría: General
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haskinator, adivina tu edad…
… si estas censado en cataluña y das las cinco ultimas cifras de tu DNI. Al parecer esta es la unica consecuencia del filtrado de datos censales para el 1 de Octubre. Los datos tienen un hash lento que se construye combinando las 5 ultimas cifras del DNI, la letra, la fecha de nacimiento y…
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wrong turns
Woit (What the Hell is Going On?) and Motl (wrong-turn-basins-gut-critics) have sparked a new round of the discussion on the existence, or not, of a wrong turn in the development of theoretical particle physics. The excuse this time is some comments of Nima Arkani-Hamed in a couple of recent lectures, but the running joke is…
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Families from SO(32)
$latex \begin{array}{llll} 496=\\ {\bf (1,24,1^c) }&+{\bf [1,15,\bar 3^c]}&+{\bf [1, \bar {15}, 3^c]}&+\\ 1,24,8^c&+[1,10,\bar 6^c]&+[1,\bar {10},6^c]&+\\ (1,1,8^c)&&&+\\&(2,5,3^c)&+(2,\bar 5,\bar 3^c)&+\\ &(1,1,1^c)&+[1,1,1^c]\\ \end{array} $ (or from SO(30), or perhaps just O(10)xU(3) or U(5)xU(3)) Point is, the first three lines seem to contain three generations with electric and colour charge. It is possible to break the 24 and 15…
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«No room for self-referring vague half-elementary, half-composite particles»
Comment to a post from Lubos in his blog. Copy paste for reference. http://motls.blogspot.com.es/2017/02/revival-of-bootstrap.html#comment-3171556156 As here you could be stressing the criticism of a comment ten years ago, allow me just a reminder for the people who was not here at that time. We set V as a five, (u,d,s,c,b), of SU(5). Then we go…
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trama y rizoma
«Una red finita donde cada par de nodos tengan un amigo en común, pero tan solo uno, tendrá siempre un político» Un «politico» es un nodo que es amigo de todos los demas, por tanto de grado máximo. Deleuze y Guattari citan, a traves de un trabajo previo de Rosenstiehl y Petitot, este teorema como…