Intersection Forms of Spin 4-Manifolds and the Pin(2)-Equivariant Mahowald Invariant

Michael J. Hopkins, Jianfeng Lin, XiaoLin Danny Shi +1

In studying the "11/8-Conjecture" on the Geography Problem in 4-dimensional topology, Furuta proposed a question on the existence of Pin(2)-equivariant stable maps between certain…