أرسل هذا في رسالة قصيرة: Mappings of the finite and infinite zero structures and invertibility structures of general linear multivariable systems under the bilinear transformation

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