| 11. | They also conform diplos, tetrads, staphylos, streptos, palizadas etc.
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| 12. | This tetrad started during the ascending node of the Moon's orbit.
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| 13. | Such an outgoing adapted tetrad can be set up as
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| 14. | Such an ingoing adapted tetrad can be set up as
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| 15. | There are three most commonly used methods to construct a complex null tetrad:
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| 16. | Also, the remaining two tetrad ( co ) vectors are constructed nonholonomically.
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| 17. | Now, the first real null tetrad vector n ^ a is fixed.
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| 18. | It grows in tetrads, irregular clusters, and cubical packets of eight.
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| 19. | The connection associated with this covariant derivative is completely determined by the tetrad.
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| 20. | Each quadruple ( tetrad ) occurs 5 times.
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