Assertion: proton's charge | /r/HasProperty | q of continuous symmetries
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text: Steven Weinberg has shown that if P2 = (−1)F, where F is the fermion number operator, then, since the fermion number is the sum of the lepton number plus the baryon number, F = B + L, for all particles in the Standard Model and since lepton number and baryon number are charges Q of continuous symmetries eiQ, it is possible to redefine the parity operator so that P2 = 1.