%0 Report %D 2009 %T Twisted Covariance vs Weyl Quantisation %A Gherardo Piacitelli %X In this letter we wish to clarify in which sense the tensor nature of the commutation relations [x^mu,x^nu]=i theta ^{mu nu} underlying Minkowski spacetime quantisation cannot be suppressed even in the twisted approach to Lorentz covariance. We then address the vexata quaestio \\\"why theta\\\"? %G en_US %U http://hdl.handle.net/1963/3451 %1 885 %2 Mathematics %3 Mathematical Physics %$ Submitted by Andrea Wehrenfennig (andreaw@sissa.it) on 2009-01-22T12:32:38Z\\nNo. of bitstreams: 1\\nPiacitelli.pdf: 135129 bytes, checksum: 0751d3833fe1a1ab81e7e9b223dcc2e5 (MD5)