Bugs - Revision history

Turion at 15:49, 25 April 2013

2013-04-25T15:49:12Z

← Older revision		Revision as of 10:49, 25 April 2013
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	{{Manual TOC Sidebar}}		{{Manual TOC Sidebar}}

	* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.		* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>. You can define [[Braid_Representatives\|braids]] with kinks, though: <code>Kink = BR[2, {1}]</code>. All knot invariants defined for braid representatives will be correctly evaluated. For example, the previously defined <code>Kink</code> will of course have the same invariants as the unknot. However, don't try to transform the braid into a planar diagram (<code>PD[BR[2, {1}]]</code>), as mathematica might hang up on that.

	* Many knot invariants (including <code>Jones</code>) do not understand the (artificial but necessary) <code>PD</code> construct "<code>Loop</code>".		* Many knot invariants (including <code>Jones</code>) do not understand the (artificial but necessary) <code>PD</code> construct "<code>Loop</code>".

			* Mathematica 9 defines its own tensor product, which causes bugs with the QuantumGroups` package. Stick with Mathematica 7 or 8 until Scott has it fixed.

			* For some unexplicable bugs (in Mathematica 8 only?), it appears helpful to state the "context" explicitly, e.g. <code>KnotTheory`BR</code> instead of <code>BR</code>, or <code>MirrorTrefoil = PD[KnotTheory`X[1, 5, 2, 4], KnotTheory`X[3, 1, 4, 6], KnotTheory`X[5, 3, 6, 2]]</code> instead of <code>MirrorTrefoil = PD[X[1, 5, 2, 4], X[3, 1, 4, 6], X[5, 3, 6, 2]]</code>.

Drorbn: Sorry, edits from 128.100.68.249 are mine (Dror).

2007-08-23T19:24:32Z

Sorry, edits from 128.100.68.249 are mine (Dror).

← Older revision		Revision as of 14:24, 23 August 2007
Line 2:		Line 2:

	* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.		* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.

	* Many knot invariants (including <code>Jones</code>) do not understand the (artificial but necessary) <code>PD</code> construct "<code>Loop</code>".		* Many knot invariants (including <code>Jones</code>) do not understand the (artificial but necessary) <code>PD</code> construct "<code>Loop</code>".

128.100.68.249 at 18:52, 23 August 2007

2007-08-23T18:52:50Z

← Older revision		Revision as of 13:52, 23 August 2007
Line 2:		Line 2:

	* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.		* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.
			* Many knot invariants (including <code>Jones</code>) do not understand the (artificial but necessary) <code>PD</code> construct "<code>Loop</code>".

128.100.68.249: New page: {{Manual TOC Sidebar}} * The `PD` notation used by KnotTheory` is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientati...

2007-08-23T18:51:13Z

New page: {{Manual TOC Sidebar}} * The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientati...

New page

{{Manual TOC Sidebar}}

* The <code>PD</code> notation used by <code>KnotTheory`</code> is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientation of <code>PD[X[1,1,2,2]]</code>.

Bugs - Revision history

Turion at 15:49, 25 April 2013

Drorbn: Sorry, edits from 128.100.68.249 are mine (Dror).

128.100.68.249 at 18:52, 23 August 2007

128.100.68.249: New page: {{Manual TOC Sidebar}} * The PD notation used by KnotTheory` is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientati...

128.100.68.249: New page: {{Manual TOC Sidebar}} * The `PD` notation used by KnotTheory` is inadequate when a knot diagram contains kinks. For example, there is no way to tell the orientati...