# Steven Sivek

 3,371 Reputation 1171 views

## Registered User

 Name Steven Sivek Member for 3 years Seen 1 hour ago Website Location Cambridge, MA Age 28
I'm a postdoctoral fellow in low-dimensional topology at Harvard.
 Mar4 awarded ● Good Answer Mar4 awarded ● Enlightened Mar3 accepted Are there non-compact, non-smoothable manifolds? Mar3 awarded ● Nice Answer Mar3 answered Are there non-compact, non-smoothable manifolds? Feb28 comment Vassilliev invariants of knots and their cables @Vivek: it's in section 9.2.2 of "Introduction to Vassiliev Knot Invariants" by Chmutov, Duzhin, and Mostovoy, available at pdmi.ras.ru/~duzhin/papers/cdbook/cdbook.pdf. Feb21 comment Computer package to compute HOMFLY polynomial?@minimax: see katlas.org/wiki/Cabling for an example. You have to import the program CableComponent.m, and then I believe you want to use CableComponent[BR[TorusKnot[19,3]], Knot[3,1]]. (I haven't used CableComponent before, but this knot seems to at least have the right Alexander polynomial according to the formula $\Delta(t) = \Delta_{T_{3,19}}(t) * \Delta_{T_{2,3}}(t^3)$.) Feb20 comment Computer package to compute HOMFLY polynomial?The KnotTheory` Mathematica package, available with lots of documentation and examples at katlas.org/wiki/Setup, can compute HOMFLY and many other knot polynomials and even produce cables for you automatically. Feb5 awarded ● Enlightened Feb5 awarded ● Nice Answer