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

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Text this: GAUGE FIELDS AND GEOMETRIC PHASES IN PERIODIC SYSTEMS