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abstraction > mathematical concept > symmetry > CPT invariance |
CPT invariance comparison table |
Subject | is a kind of | has definition |
---|---|---|
symmetry | mathematical concept | The property of being unchanged after some transformation. A square, for example, has a 4-sided rotational symmetry. It appears the same after it is rotated by 90 degrees. |
CPT invariance | symmetry | A theory has "CPT invariance" if for every possible reaction between subatomic particles, a reaction can also occur in which the electrical charges of the particles changed to their opposites, the mirror image of the particle trajectories is used, and the directions of motion are reversed. Assuming general notions of modern physics, all conceivable theories of nature are CPT invariant. |
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