Spin characters of the alternating group which are proportional to linear characters in characteristic 2
arXiv:2606.10609
Abstract
We classify when a spin and a non-spin irreducible character of the alternating group have proportional 2-modular reductions. Equivalently, we classify when such a pair of characters are proportional on elements of odd order.
4 pages (v3: added explanation of notation for 4-bar-core)