For a Weyl group W of classical type, we present a formula to calculate the restriction of (graded) Springer representations of W to a maximal parabolic subgroup W′ where the types of W and W′ are in the same series. As a result, we obtain recursive formulas for the Betti numbers of Springer fibers for classical types.

中文翻译：

---

关于古典型弹簧纤维的BETIT数

对于经典类型的Weyl群W，我们提出了一个公式来计算W的（渐变）Springer表示对最大抛物线子群W '的限制，其中W和W '的类型相同。结果，我们获得了经典类型的Springer纤维的贝蒂数的递归公式。