1. The user is asking to identify a man in a black and white portrait wearing a uniform with the letters "RI" on his collar. 2. This is not a math or science question but rather a request for identification based on an image description. 3. Since the request is non-mathematical and no math problem is presented, I cannot provide a math solution. 4. The man could be a historical or military figure associated with "RI" insignia, but without more context or visual data, identification is not possible here. 5. For math assistance, please provide a math problem or question.