| 31. | Where I is the 3 x 3 identity matrix and \ boldsymbol \ tau is the deviatoric stress tensor.
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| 32. | This time there is a 2 ?2 identity matrix pre-multiplying the energy operator conventionally not written.
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| 33. | Throughout, " ? ij " is the Kronecker delta, the components of the identity matrix.
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| 34. | It follows that the determinant of the identity matrix is 1 and the trace is " n ".
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| 35. | If this matrix were the identity matrix, then the flavor eigenstates would be the same as the mass eigenstates.
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| 36. | Indices are " raised " or " lowered " by multiplication by an appropriate matrix, often the identity matrix.
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| 37. | Now it is straightforward to verify closure, associativity, and inclusion of identity ( the identity matrix ) and inverses.
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| 38. | A "'scalar matrix "'is a diagonal matrix which is a constant times the identity matrix.
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| 39. | The factors are determined up to the negative 4th-order identity matrix, i . e . the central inversion.
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| 40. | Here I is the identity matrix of the same dimension as A, and h is a real, positive number.
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