Noncommutative rational functions and boundary links.
Nonexistence of a weakly neighbourly polyhedral map of type .
Nonfibered knots and representation shifts
A conjecture of [swTAMS] states that a knot is nonfibered if and only if its infinite cyclic cover has uncountably many finite covers. We prove the conjecture for a class of knots that includes all knots of genus 1, using techniques from symbolic dynamics.
Nonintegral boundary-slopes exist
Non-isotopic Heegaard splittings of Seifert fibered spaces. With an appendix by R.Weidmann.
Nonobtuse Triangulation of Polygons.
Nonpositive immersions, sectional curvature, and subgroup properties.
Nonpositively curved 2-complexes with isolated flats.
Non-positively curved aspects of Artin groups of finite type.
Nonpositively curved metrics on 2-polyhedra.
Non-Simply-Connected Surgery and Some Results in Low Dimensional Topology.
Non-singular graph-manifolds of dimension 4.
Non-slice linear combinations of algebraic knots
We show that the subgroup of the knot concordance group generated by links of isolated complex singularities intersects the subgroup of algebraically slice knots in an infinite rank subgroup.
Nonstandard analysis and the theory of shape
Non-standard automorphisms of branched coverings of a disk and a sphere
Let Y be a closed 2-dimensional disk or a 2-sphere. We consider a simple, d-sheeted branched covering π: X → Y. We fix a base point A₀ in Y (A₀ ∈ ∂Y if Y is a disk). We consider the homeomorphisms h of Y which fix ∂Y pointwise and lift to homeomorphisms ϕ of X-the automorphisms of π. We prove that if Y is a sphere then every such ϕ is isotopic by a fiber-preserving isotopy to an automorphism which fixes the fiber pointwise. If Y is a disk, we describe explicitly a small set of automorphisms of...
Non-Trivial negative links have positive signature.
Non-triviality of the -polynomial for knots in .
Normal all pseudo-Anosov subgroups of mapping class groups.
Normal-convexity and equations over groups.
Note on the Casson-Gordon Invariant of a Satellite Knot.