أرسل هذا في رسالة قصيرة: A note on sharp 1-dimensional poincaré inequalities

             ___      ______   _    _    _____    
  ____      / _ \\   /_   _// | || | || |  __ \\  
 |    \\   / //\ \\  `-| |,-  | || | || | |  \ || 
 | [] ||  |  ___  ||   | ||   | \\_/ || | |__/ || 
 |  __//  |_||  |_||   |_||    \____//  |_____//  
 |_|`-`   `-`   `-`    `-`'     `---`    -----`   
 `-`