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what is a Galois Hull?

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Same as the Galois closure, I think? So if E/k is a finite extension, then the smallest Galois extension of k that contains E. This question is sort of at the border of what is MO acceptable, because if I'm not mistaken, even a cursory Google search turns up the answer. –  Todd Trimble Feb 4 '11 at 14:58
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Seconded; though I find it amusing that this question is now the number one Google result for 'galois hull'... –  Thomas Bloom Feb 4 '11 at 16:10
    
@Todd: thanks for the info. –  Uday Apr 1 '11 at 12:00
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closed as not a real question by Pete L. Clark, Bill Johnson, Cam McLeman, Daniel Moskovich, Leonid Positselski Feb 4 '11 at 17:08

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