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About Heath's theorem

Posted on 2006-11-02
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What does this theorem say ?
Where is it used? In Normalization ?
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Question by:soodsandeep
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by:Vadim Rapp
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if there's relation between 3 entities a,b,c and you decompose it to a->b and a->c and then join them, then the result will be not less than the original relation.

> Where is it used? In Normalization ?

The above is application to relational area. The theorem itself is formulated in abstract terms, so, like every mathematical fact, it may be used wherever is applicable,
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by:Vadim Rapp
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50/50 to Arthur and to me.
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by:Arthur_Wood
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works for me.

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