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Lauro D. Lins

Publications and source records attributed to Lauro D. Lins.

3 recordsLinked to original sources

The $κ_r$-version of the WRT$_r$-invariants, monochromatic 3-connected blinks and evidence for a conjecture on their induced 3-manifolds

A {\em blink} is a plane graph with a bipartition (black, gray) of its edges. Subtle classes of blinks are in 1-1 correspondence with closed, oriented and connected 3-manifolds up to orientation preserving homeomorphisms \cite{lins2013B}. Switching black and gray in a blink $B$, giving $-B$, reverses the manifold orientation. The dual of the blink $B$ in the sphere $\mathbb{S}^2$ is denoted by $B^ \star$. Blinks $B$ and $-B^\star$ induce the same 3-manifold. The paper reinforces the Conjecture that if $B' \notin \{B,-B^\star\}$, then the monochromatic 3-connected (mono3c) blinks $B$ and $B'$ induce distinct 3-manifolds. Using homology of covers and length spectra, we conclude the topological classification of 708 mono3c blinks that were organized in equivalence classes by WRT-invariants in \cite{lins2007blink}. We also present a reformulation of the combinatorial algorithm to obtain the WRT-invariants of \cite{lins1995gca} using only the blink.

math.GT↗

All the shapes of spaces: a census of small 3-manifolds

In this work we present a complete (no misses, no duplicates) census for closed, connected, orientable and prime 3-manifolds induced by plane graphs with a bipartition of its edge set (blinks) up to $k=9$ edges. Blinks form a universal encoding for such manifolds. In fact, each such a manifold is a subtle class of blinks, \cite{lins2013B}. Blinks are in 1-1 correpondence with {\em blackboard framed links}, \cite {kauffman1991knots, kauffman1994tlr} We hope that this census becomes as useful for the study of concrete examples of 3-manifolds as the tables of knots are in the study of knots and links.

math.GT↗

A challenge to 3-manifold topologists and group algebraists

This paper poses some basic questions about instances (hard to find) of a special problem in 3-manifold topology. "Important though the general concepts and propositions may be with the modern industrious passion for axiomatizing and generalizing has presented us...nevertheless I am convinced that the special problems in all their complexity constitute the stock and the core of mathematics; and to master their difficulty requires on the whole the harder labor." Hermann Weyl 1885-1955, cited in the preface of the first edition (1939) of \cite{whitehead1997}.

math.GT↗