Strong rule: style --- 3D Pixar ---. 3D Pixar style. The professor holds up one finger. On the board next to him is written in Russian: 'Д = 0 : ОДИН КОРЕНЬ' and the formula 'x = -b / 2a'. Warm, optimistic lighting.
Character appearance reference (MUST match exactly):
- Профессор Архимед: A friendly, energetic math professor in 3D Pixar style. He has messy white hair, round glasses, a neat beard, wearing a tweed jacket with elbow patches and a bright bow tie. Expressive face, warm smile, animated gestures.
