Talk:Severi–Brauer variety: Difference between revisions
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Mark viking (talk | contribs) Assessment: +Mathematics: class=Start, priority=Low, field=algebra (assisted) |
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For example, that's what the book of Görtz and Wedhorn (Algebraic Geometry I) calls them. |
For example, that's what the book of Görtz and Wedhorn (Algebraic Geometry I) calls them. |
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== What is the field of definition of the degree d embedding? == |
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Is the second sentence in the following correct? |
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"As a consequence, we see that if the class of X has order d in the Brauer group then there is a divisor class of degree d on X. The associated linear system defines the d-dimensional embedding of X over a splitting field L." |
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I thought that Pic(X) in the exact sequence is Pic(X/K), so the conclusion should be |
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"The associated linear system defines a d-dimensional embedding of X over the field K." |
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[[User:JosephSilverman|JosephSilverman]] ([[User talk:JosephSilverman|talk]]) 14:06, 22 January 2018 (UTC) |
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Revision as of 14:06, 22 January 2018
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Is there a particular reason this is not called a Brauer-Severi variety, as per the mathematical convention of giving credit in alphabetical order?
For example, that's what the book of Görtz and Wedhorn (Algebraic Geometry I) calls them.
What is the field of definition of the degree d embedding?
Is the second sentence in the following correct?
"As a consequence, we see that if the class of X has order d in the Brauer group then there is a divisor class of degree d on X. The associated linear system defines the d-dimensional embedding of X over a splitting field L."
I thought that Pic(X) in the exact sequence is Pic(X/K), so the conclusion should be
"The associated linear system defines a d-dimensional embedding of X over the field K."