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  ____       ___      ______   _    _     ______  
 |  _ \\    / _ \\   /_   _// | || | ||  /_   _// 
 | |_| ||  / //\ \\  `-| |,-  | || | ||  `-| |,-  
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 |_|\_\\  |_||  |_||   |_||    \____//     |_||   
 `-` --`  `-`   `-`    `-`'     `---`      `-`'

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發送短信 : Fundamental groups of open K3 surfaces, Enriques surfaces and Fano 3-folds