3 papers
cs.AI2026
Scaling Laws for Generative Reward Models
Angel Raychev, Nathan Lile, Rafael Rafailov
We study generative reward models (GenRMs) as online preference providers for policy optimization in creative writing. Across Qwen3 reward-model sizes from 0.6B to 14B, Thinking ju…
math.CO2026
Four-arm polyominoes in Golomb's hierarchy: A complete classification with Lean verification
Angel Ivanov Raychev
We classify the polyominoes obtained by adjoining four straight arms to a single square, allowing zero arm lengths, according to their ability to tile rectangles, half-strips, bent…
math.CO2021
A Generalization of Descent Polynomials
Angel Raychev
The notion of a descent polynomial, a function in enumerative combinatorics that counts permutations with specific properties, enjoys a revived recent research interest due to its…