arXiv · 1111.3352
The affine Springer fiber corresponding to $GL_{4}$ and regular semi-simple integral split element admits an affine paving, so its cohomology is "pure".
Zongbin Chen. 2011-11-14. Puret\'e des fibres de Springer affines pour $GL_4$. https://arxiv.org/abs/1111.3352
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