Computable Legendrian invariants


Journal Article

We establish tools to facilitate the computation and application of the Chekanov-Eliashberg differential graded algebra (DGA), a Legendrian-isotopy invariant of Legendrian knots and links in standard contact three space. More specifically, we reformulate the DGA in terms of front projections, and introduce the characteristic algebra, a new invariant derived from the DGA. We use our techniques to distinguish between several previously indistinguishable Legendrian knots and links. © 2002 Elsevier Science Ltd. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Ng, LL

Published Date

  • January 1, 2003

Published In

Volume / Issue

  • 42 / 1

Start / End Page

  • 55 - 82

International Standard Serial Number (ISSN)

  • 0040-9383

Digital Object Identifier (DOI)

  • 10.1016/S0040-9383(02)00010-1

Citation Source

  • Scopus