Harmonic-map projection conjecture for pinched Hadamard manifolds

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Let MM be a pinched Hadamard manifold, meaning a simply connected, complete Riemannian manifold whose sectional curvature is bounded between two negative constants. Let ι:H2→M\iota:\mathbb{H}^2\to M be a quasi-isometric embedding. Harmonic-map projection conjecture. There exists a harmonic map h:M→H2h:M\to\mathbb{H}^2 such that

sup⁡x∈Mdist⁡(x,ι∘h(x))<∞.\sup_{x\in M}\operatorname{dist}(x,\iota\circ h(x))<\infty.

The conjecture asserts that the paper's strategy for constructing harmonic maps near nearest-point retractions works for every pinched Hadamard manifold and every such quasi-isometric embedding; the source presents it as an open conjecture following a partial positive result.

References

Primary source

Ognjen Tošić, “Harmonic projections in negative curvature”, arXiv:2203.02578 (2023).

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