Prompt
Generate a realistic portrait of a British statistician and mathematician, John Ashworth Nelder, in a formal setting, possibly with a background that subtly references his work in statistics and mathematics, such as a chalkboard with statistical formulas or a bookshelf with notable publications like "Generalized Linear Models" (1972) and "A simplex method for function minimization" (1965); he should be middle-aged, reflecting his age during his peak career years, dressed in attire typical of a professional in the mid to late 20th century, with a thoughtful expression, sitting in a posture that suggests deep contemplation or analysis, possibly with a pen in hand and a notebook or papers in front of him.
