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

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Text this: Quadratic transformations of copula density and probability density