Prompt
Create an image of a middle-aged British man with a kind face, wearing a suit and a tie, sitting in a library or a study with mathematical equations and books in the background. He should be looking directly at the camera with a gentle smile. The style should be realistic and formal, reflecting his profession as a mathematician and his title as Sir. Incorporate some subtle hints to his work, such as a blackboard with mathematical notation or a book with a prominent mathematical symbol. The overall mood should be one of intellectual curiosity and authority. The image should be in a style similar to a formal portrait.