The weak Whitney theorems for harmonic surfaces
The weak Whitney theorems for harmonic surfaces
Let be the target manifold and let denote the moduli space of harmonic surfaces in . A harmonic immersion is a harmonic map that is an immersion, and a harmonic embedding is a harmonic map that is an embedding.
Weak Whitney theorems. The space of harmonic immersions in is open and dense, and connected if ; moreover, the space of harmonic embeddings in is open and dense, and connected if .
The preceding local results establish these properties near somewhere injective harmonic maps with isolated singularities, while this conjecture asserts them globally without the isolated-singularity hypothesis. It predicts generic immersion and embedding behavior for harmonic surfaces in the indicated target dimensions.
Sources & referencesView supporting material
Primary source
Nathaniel Sagman, “Spaces of harmonic surfaces in non-positive curvature”, arXiv:2111.04142 (2023).
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