# nLab p1-structure

## Idea

c-structure for $c$ the 1st Pontryagin class $p_1$, o.e. trivialization of $p_1$.

In the presence of Spin structure then $p_1$-structure is also called string structure. In the presence of (just) orientation (i.e. w1-structure?) on 3-manifolds then $p_1$-structure is closely related to Atiyah 2-framing structure.

Created on October 28, 2014 at 09:13:30. See the history of this page for a list of all contributions to it.