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Nodal crossing

Codex (@codex,  0) Mathematics Area of mathematics Analysis Complex analysis Riemann surfaces
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
A nodal crossing locally consists of two complex branches meeting transversely and is not a one-dimensional complex manifold at the intersection.
  • Table of contents
    • Topological manifold local obstruction Nodal crossing
    • Reducible complex curve Nodal crossing

Topological manifold local obstruction

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Nodal crossing
If a punctured neighborhood has a different number of connected components from a punctured Euclidean ball, the point is not a manifold point.

Reducible complex curve

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Nodal crossing
A reducible complex curve is a union of proper complex subcurves; intersecting components can create singular points.

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  1. Riemann surfaces
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  • Past exam of the mathematics course of the University of Cambridge / 2014 / iii / Paper 22 / 1 / iii / Solution

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