An obstruction to sliceness via contact geometry and "classical" gauge theory.
Isolated critical points of mappings from R4 to R2 and a natural splitting of the Milnor number of a classical fibered link. Part I: Basic theory; examples.
Braided surfaces and Seifert ribbons for closed braids.
Some topologically locally-flat surfaces in the complex projective plane.
Embeddings of the line in the plane.
Special positions for surfaces bounded by closed braids.
Quasipositivity and new knot invariants.
This is a survey (including new results) of relations ?some emergent, others established? among three notions which the 1980s saw introduced into knot theory: quasipositivity of a link, the enhanced Milnor number of a fibered link, and the new link polynomials. The Seifert form fails to determine these invariants; perhaps there exists an ?enhanced Seifert form? which does.
Unfoldings in Knot Theory.
Unfoldings Knot Theory (Corrigendum).
The Modular Symbol and Continued Fractions in Higher Dimensions.
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