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Quantum Field Theory

Conservation Rules

Symmetry Conservation Symmetry means that something is unchanged after some sort of operation. In the case of geometrical symmetry it is the configuration that remains the same after rotating 180o as shown in Figure 01ea. Whereas in theoretical physics symmetry the invariance is about the form of the equations before and after the transformation. Symmetry in mathematical expressions constrains the form from an infinite number of choices, it also allows extraction of information without deluging in detailed computation. A good example is the conservation laws emerging from the global symmetry of the equations. Some people see beauty in such formulation.

Figure 01ea Symmetry
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Figure 01eb Conservation
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