Issue #48 has been reported by Ken DATE.

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Bug #48: Matrix#inv の説明
http://redmine.ruby-lang.org/issues/show/48

Author: Ken DATE
Status: Open
Priority: Low
Assigned to: 
Category: doc
Target version: 
reporter: rock
ruby_version: 1.8,1.9


Matrix#inv の説明に，mathn を require するか否かで結果が異なることを付け加えるべきではないでしょうか。

とくに，Ruby 1.8 の場合，mathn を require しないと，成分が整数値の行列の正しい逆行列を返さないようなので。


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