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is there group named Shafarevich-Tate group I,II?why Shafarevich-Tate group III is named?

asked 2013-10-23 05:54:44 +0200

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is there group named Shafarevich-Tate group I,II?why Shafarevich-Tate group III is named?

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answered 2013-12-26 08:43:22 +0200

slelievre gravatar image

The Tate-Shafarevich group is denoted by the cyrillic letter "sha" (like Shafarevich), which looks a bit like III, but it's not a roman numeral three. See Wikipedia.

Side note: this is not at all a Sage question, and you could have found the answer by a simple search on your favourite search engine or on Wikipedia.

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thank you very much! I have never known cyrillic letter!

cjsh gravatar imagecjsh ( 2013-12-29 23:02:51 +0200 )edit

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Asked: 2013-10-23 05:54:44 +0200

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Last updated: Dec 29 '13