21. This follows from the application of selection rules . 22. These were called the selection rules , which were a puzzle until the advent of matrix mechanics. 23. Given these general definitions, the Woodward-Hoffmann rules can be stated succinctly as a single selection rule : 24. Under selection rules , coaches had to replace Cook with the next-best aerialist under the selection criteria. 25. The degeneracy is lifted only for certain states obeying the selection rules , in the first order. 26. Using correlation diagrams one can derive selection rules for the following generalized classes of pericyclic reactions. 27. An additional barrier can be the selection rule . 28. It was originally introduced to impose additional restriction to quantum theory beyond those of selection rules . 29. The selection rule for and is " m " 2 } } for the spherical tensors. 30. Transitions which do not involve the absorption or emission of radiation are not affected by selection rules .
