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Oct 26, 2021 at 11:43 comment added Ben McKay The link to the Atlas now points to another link, which is dead.
May 15, 2012 at 3:20 comment added curious ps: i tried using maple's "casesplit" command but it blew up my computer [4gig]...
May 15, 2012 at 3:19 comment added curious I wrote down a system of overdetermined PDE's that such harmonic morphism must satisfy. But it seems like a large system containing 8 equations; I am at a loss as to how to reduce it... lots of structure though...
May 15, 2012 at 0:28 history edited Robert Bryant CC BY-SA 3.0
Fixed the link (crudely, but I couldn't seem to make the standard way work)
May 15, 2012 at 0:19 history edited Robert Bryant CC BY-SA 3.0
Added reference material
May 14, 2012 at 22:04 comment added Paul Reynolds To expound: the paper "Bent Fuglede, Harmonic morphisms between Riemannian manifolds, Ann. Inst. Fourier (Grenoble) 28 (1978)" is (I think) the first paper where the term 'harmonic morphism' is defined. There is some overlap with the paper by Ishihara in Igor's answer as these were published around the same time. Note that harmonic morphisms are not the same as harmonic maps or maps that commute with the Laplacian ("Bill Watson, Manifold maps commuting with the Laplacian, J. Differential Geometry 8 (1973)").
May 14, 2012 at 21:19 history edited Robert Bryant CC BY-SA 3.0
Fixed a notational conflict
May 14, 2012 at 20:57 history answered Robert Bryant CC BY-SA 3.0