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Example 1.
Define a 4-dimensional manifold with coordinates , where and are real coordinates, andare complex coordinates and the complex conjugate of is
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Calculate the complex conjugate of some vectors on .
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Calculate the complex conjugate of a vector depending upon parameters and . First assume and are real.
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Now suppose that is complex and that the complex conjugate of is .
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Calculate the complex conjugate of a rank 2 tensor:
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| (4.9) |
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Calculate the complex conjugate of a rank 4 differential form
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| (4.11) |
| (4.12) |
Example 2.
Calculate the real and imaginary parts of the vectors, tensors and differential forms defined in Example 1.
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| (4.14) |
| (4.15) |
| (4.16) |
| (4.17) |
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| (4.18) |
Example 3.
The command DGconjugate works with anholonomic frames. To check this, first define an anholonomic frame and initialize it..
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| (4.19) |
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| (4.21) |
Example 4.
Find the conjugate of a quaternion. First use the command AlgebraData to obtain the structure equations for the quaternions.
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| (4.22) |
The labels for the vectors and dual 1-forms can be specified upon initialization of the algebra. We will use the standard for the quaternion basis vectors, and for the dual 1-forms.
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alg >
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Define a quaternion.
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| (4.24) |
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Example 5.
Find the conjugate of an octonian. Use the command AlgebraData to obtain the structure equations for the octonions.
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| (4.26) |
Define an octonion.
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| (4.28) |
| (4.29) |