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

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Text this: Quadratic transformations of copula density and probability density