Two nonlocal inverse curvature flows of convex closed plane curves

In this paper we introduce two $1\mathrm{/}{\kappa }^n$-type ($n\ge 1$) curvature flows for closed convex planar curves. Along the flows the length of the curve is decreasing while the enclosed area is increasing. And finally, the evolving curves converge smoothly to a finite circle if they do not develop singularity during the evolution process.