發送短信 : Defining relations of invariants of two 3 × 3 matrices

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