發送短信 : On commutative Noetherian rings which have the s.p.a.r. property

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 | .  ||  | \_/ ||  /___//    | ||__     /    // 
 |_|\_||   \___//   `__ `     |_____||  /____//  
 `-` -`    `---`    /_//      `-----`  `-----`   
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