Conway skein triple (L₊, L₋, L₀)

E169188

The Conway skein triple (L₊, L₋, L₀) is a standard configuration of three related link diagrams used in knot theory to express how a link invariant, such as the Conway polynomial, changes under local crossing modifications.

All labels observed (1)

Label Occurrences
Conway skein triple (L₊, L₋, L₀) canonical 1

How this entity was disambiguated

Statements (37)

Predicate Object
instanceOf configuration of link diagrams
link diagram
link diagram
link diagram
skein triple
appearsIn literature on polynomial link invariants
literature on skein modules
appliesTo oriented link diagrams
associatedWith Conway polynomial
surface form: Alexander–Conway polynomial

Conway polynomial
skein relation ∇(L₊) − ∇(L₋) = z ∇(L₀)
constraint L₀ is obtained from L₊ and L₋ by smoothing that crossing
L₊ and L₋ differ only by the sign of one crossing
definedBy local modification at a single crossing
domain oriented links in S³
field knot theory
generalizationOf skein triples for other link polynomials
hasPart L₀
L₊
L₋
hasProperty contains a specified negative crossing
contains a specified positive crossing
obtained by smoothing the specified crossing
introducedInContextOf John Horton Conway’s work on knot polynomials
locality diagrams coincide outside a small disk containing the crossing
mathematicalDiscipline low-dimensional topology
notationUsedIn standard textbooks on knot theory
relatedTo Alexander polynomial
HOMFLY-PT polynomial
Jones polynomial
requires choice of a distinguished crossing in L₊ and L₋
usedFor defining skein relations
defining the Conway polynomial
expressing changes of link invariants under local crossing modifications
studying link invariants
usedIn inductive proofs of properties of link invariants
recursive computation of the Conway polynomial

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.

Conway polynomial definedBy Conway skein triple (L₊, L₋, L₀)