Prompt

Create an image of a mathematical notation on a blackboard, specifically the Kronecker symbol, denoted as (a/b), with the values -1, 0, and 1 written below it, surrounded by equations and formulas related to number theory, quadratic residues, and quadratic reciprocity, in a 19th-century style chalkboard setting with a subtle background texture, using a formal and technical illustration style.

Image by stabilityai/stable-diffusion-3.5-large-turbo