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

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Text this: Material parameters characterization for arbitrary N-sided regular polygonal invisible cloak