The matrices α i (i = 1, 2, 3) and β in the Dirac equation (1.8) can
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where 1 and 0 are the 2 Ã 2 unit matrix and null matrix, respectively, and the Pauli spin matrices Ïi are
Check that these forms satisfy the anti commutation relations
[αi, β] ¡ αiβ + βαi = 0 and [αi, αj] = 0, where i j = 1, 2, 3.
Equation 1.8
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-(:) *-(; 4). -(? :). -- (? :). -1 -1
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