Prompt
Generate a realistic image of a middle-aged man from the 1980s, dressed in attire typical of a mathematician or academic, sitting at a desk with papers, books, and possibly a chalkboard or whiteboard in the background, surrounded by symbols and equations related to mathematics, specifically those that might represent his work on alternating sign matrices, the Robbins conjecture, Robbins constant, or Robbins pentagon tiling; he should have a thoughtful or contemplative expression, with a pen in hand and a few papers or notes scattered around, indicating deep engagement with mathematical problems.
