This section considers the normalizer of a subgroup H of G. We assume we have a base and strong generating set for H. The property is PH : g ~ G normalizes H

Database System Concepts
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Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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This section considers the normalizer of a subgroup H of G. We assume we have a base and
strong generating set for H. The property is
PH : g ~ G normalizes H <G
The two facts we know about normalizing elements which lead to our choice of a base and the
restrictions on the base images are
Lemma 1
If g normalizes a subgroup H then g permutes the orbits of H.
Lemma 2
If g normalizes a subgroup H and g fixes [3 then g normalizes the stabiliser H[~.

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