Prompt
Generate a realistic image of a middle-aged man in the 1960s or 1970s, likely in an academic or professional setting, with a subtle background hinting at computer science or mathematics, such as a blackboard with equations or a computer terminal. The man should have a gentle, introspective expression, with a slight smile. He is dressed in formal, vintage attire, possibly with glasses and a notepad or pen in hand. Incorporate subtle references to his work, such as a document or book titled "ALGOL 68" or "Van Wijngaarden grammar" in the background. The style should be reminiscent of a classic, timeless portrait of a scholar.
