أرسل هذا في رسالة قصيرة: A butterfly-accelerated volume integral equation solver for broad permittivity and large-scale electromagnetic analysis

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