Text this: A new closed form method for design of variable bandwidth linearphase FIR filter using different polynomials

           _    _    __   __     ___      _____   
  ____    | || | ||  \ \\/ //   / _ \\   /  ___|| 
 |    \\  | || | ||   \   //   / //\ \\ | // __   
 | [] ||  | \\_/ ||   / . \\  |  ___  ||| \\_\ || 
 |  __//   \____//   /_//\_\\ |_||  |_|| \____//  
 |_|`-`     `---`    `-`  --` `-`   `-`   `---`   
 `-`