## Topological Methods in Nonlinear Analysis

### Connected sum constructions for constant scalar curvature metrics

#### Abstract

We give a general procedure for gluing together possibly noncompact manifolds of constant scalar curvature which satisfy an extra nondegeneracy hypothesis. Our aim is to provide a simple paradigm for making "analytic" connected sums. In particular, we can easily construct complete metrics of constant positive scalar curvature on the complement of certain conﬁgurations of an even number of points on the sphere, which is a special case of Schoen's [S1] well-known, difficult construction. Applications of this construction produces metrics with prescribed asymptotics. In particular, we produce metrics with cylindrical ends, the simplest type of asymptotic behaviour. Solutions on the complement of an infinite number of points are also constructed by an iteration of our construction.

#### Article information

Source
Topol. Methods Nonlinear Anal., Volume 6, Number 2 (1995), 207-233.

Dates
First available in Project Euclid: 16 November 2016

https://projecteuclid.org/euclid.tmna/1479265331

Mathematical Reviews number (MathSciNet)
MR1399537

Zentralblatt MATH identifier
0866.58069

#### Citation

Mazzeo, Rafe; Pollack, Daniel; Uhlenbeck, Karen. Connected sum constructions for constant scalar curvature metrics. Topol. Methods Nonlinear Anal. 6 (1995), no. 2, 207--233. https://projecteuclid.org/euclid.tmna/1479265331

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