Metrically un-knotted corank 1 singularities of surfaces in ${\mathbb{R}}^4$

Lev Birbrair, Rodrigo Mendes, Juan Jose Nuño-Ballesteros

The paper is devoted to relations between topological and metric properties of germs of real surfaces, obtained by analytic maps from $R^2$ to $R^4$. We show that for a big class o…