Bernd J. Wuebben

works on

3 n)-torus knots 1 bounding cochains 1 immersed curves 1 instanton homology 1 instanton knot homology 1 lagrangian floer homology 1 pillowcase 1 pillowcase homology 1 pretzel knots 1 traceless su(2) representations 1 two-bridge knots 1

From the 2 of 5 linked papers with an AI index.

collaborators

5 papers

math.GM2026

An exotic $S^{2} \times S^{2}$ and an exotic $CP^{2} # CP^{2}$

Bernd Johannes Wuebben

We prove that a specified Lidman-Piccirillo piece $V$ , a symplectic $4$ -manifold with the homology of $S^{2} \times D^{2}$ built from a genus- $2$ surface bundle over a once-punctured to…

math.DG2026

Slope stability of tangent bundles of smooth toric Fano varieties

Bernd Johannes Wuebben

We classify the anticanonical slope stability of tangent bundles for all $8, 630$ smooth toric Fano varieties in dimensions three through six, by exact evaluation of Klyachko's cr…

math.GT2026

The instanton homology of the $(- 2, 3, q)$ pretzel knots and Maurer-Cartan deformations in the two-arc algebra of the pillowcase

Bernd Johannes Wuebben, Bernd J. Wuebben

The paper determines that the reduced singular instanton homology of the pretzel knots P(-2,3,q) has rank q+2 for odd q≥3, and computes explicit bounding cochains in the pillowcase…

math.GT2026

Traceless $SU (2)$ characters and $Z /4$ instanton gradings for two-bridge and $(3, n)$ -torus knots

Bernd Johannes Wuebben, Bernd J. Wuebben

The paper computes traceless SU(2) character varieties for two‑bridge and (3,n)‑torus knots, proves that the irreducible representations are binary‑dihedral for two‑bridge knots an…

q-fin.PM2026

Beyond De Prado and Cotton: Hierarchical and Iterative Methods for General Mean-Variance Portfolios

Bernd Johannes Wuebben

Hierarchical Risk Parity (De Pardo) and the Schur-complement generalization of Cotton are among the most widely adopted regularised portfolio construction methods, yet both are sig…

An exotic S2×S2 and an exotic CP2#CP2

Slope stability of tangent bundles of smooth toric Fano varieties

The instanton homology of the (−2,3,q) pretzel knots and Maurer-Cartan deformations in the two-arc algebra of the pillowcase

Traceless SU(2) characters and Z/4 instanton gradings for two-bridge and (3,n)-torus knots

Beyond De Prado and Cotton: Hierarchical and Iterative Methods for General Mean-Variance Portfolios

An exotic $S^{2} \times S^{2}$ and an exotic $CP^{2} # CP^{2}$

The instanton homology of the $(- 2, 3, q)$ pretzel knots and Maurer-Cartan deformations in the two-arc algebra of the pillowcase

Traceless $SU (2)$ characters and $Z /4$ instanton gradings for two-bridge and $(3, n)$ -torus knots