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…

Families from SO(32)

(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 from su5 to su3 + su2, and then identify the electric charge. We can choose 4(Q2+Q3)=-2/3 and Q3=-1/5 or 4(Q2+Q3)=1/3 and…

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…