The colinearity and singular-set conjecture for homogeneous chambars

Let RR be the radial vector field on Cn\mathbb{C}^n, and let

Col(X,Y)={mCnX(m)Y(m)=0}\mathrm{Col}(X,Y)=\{m\in\mathbb{C}^n\mid X(m)\wedge Y(m)=0\}

be the set of colinearity of two holomorphic vector fields. Let Ch(X1,X2,,Xp)\mathrm{Ch}(X_1,X_2,\ldots,X_p) be a homogeneous pp-chambar of degree ν1\nu\geq 1 on Cn\mathbb{C}^n, with p2p\geq 2; write Sing(Xk)={mCnXk(m)=0}\mathrm{Sing}(X_k)=\{m\in\mathbb{C}^n\mid X_k(m)=0\}.

Homogeneous-chambar singular-set conjecture. For every k1k\geq 1,

Col(Xk,R)=Sing(Xk).\mathrm{Col}(X_k,R)=\mathrm{Sing}(X_k).

In particular,

dimSing(Xk)1.\dim\mathrm{Sing}(X_k)\geq 1.

The conjecture concerns the geometry of homogeneous chambars and predicts that each vector field is colinear with the radial field exactly on its singular set. The source gives no resolution.

Sources & referencesView supporting material

Primary source

Dominique Cerveau, Julie Déserti and Alcides Lins Neto, “Holomorphic vector fields with a barycentric condition”, arXiv:2206.06475 (2023).

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