© | Dror Bar-Natan: Academic Pensieve: Blackboard Shots: Random

Blackboard Shots with Prefix "Ens"


200218-140232: Extending degree by degree (2).

200218-133719: Extending degree by degree.

191219-133459: Completions of free Abelian groups.

191217-142019: The co-product on \calA_1.

191129-162007: Double filtrations.

191129-161250: Maps between inverse limits.

191120-153531: Expansions for the impure braid group.

191113-142730: Whirling and PIT.

190904-184633: The annular prototypical complex (2).

190808-170302: The braid category / algebraic structure.

190629-112606: The annular prototypical complex.

190626-170638: Can the error avoid strand 0? (2)

190621-174535: Can the error avoid strand 0?

190614-175007: A proposed kernel (3).

190611-170340: A proposed kernel (2).

190607-153943: A proposed kernel.

190606-164456: $\Box$.

190604-164806: Algebraic structures.

190523-162534: Some free Lie algebras (5).

190523-161916: Some free Lie algebras (4).

190521-165432: Some free Lie algebras (3).

190517-173306: Some free Lie algebras (2).

190515-175329: Some free Lie algebras.

190504-133410: The "Easy Z" in $GT_a$.

190504-114508: Degree one $GRT_a$ (4).

190503-173501: Degree one $GRT_a$ (3).

190502-181922: Degree one $GRT_a$ (2).

190426-164728: Degree one $GRT_a$.

190425-180757: An outer automorphism.

190424-165809: Fixing the associated graded in degree 1.

190423-170431: A 3-chord syzygy? (2)

190419-100912: A 3-chord syzygy?

190416-163629: Figuring out $E$ relations (3).

190415-153910: Figuring out $E$ relations (2).

190415-151854: Figuring out $E$ relations.

190414-152436: Slides and $R_2$ (2).

190414-144059: Slides and $R_2$.

190412-171156: Using Furusho (2).

190412-163907: Using Furusho.

190409-170414: Random (3).

190407-155524: Random (2).

190407-144750: Random.

190405-174541: Surjections of automorphism groups.

190402-160412: A syzygy between clusters.

190315-164230: Clusters and guaranteed relations (2).

190313-164833: Clusters and guaranteed relations.

190307-182148: The blue map and syzygies (6).

190305-170618: The blue map and syzygies (5).

190227-172844: The blue map and syzygies (4).

190221-172418: The blue map and syzygies (3).

190215-160704: The blue map and syzygies (2).

190207-175827: The blue map and syzygies.

190205-155950: The $CD_a$ universe (7).

190203-150015: The $CD_a$ universe (6).

190125-171152: The $CD_a$ universe (5).

190116-164613: The $CD_a$ universe (4).

190114-185544: The $CD_a$ universe (3).

190113-133544: The $CD_a$ universe (2).

190113-103553: The $CD_a$ universe.

181031-174715: The Hutchings 8T and 14T syzysgies.

181022-182842: When is it that we've found all syzygies? (3)

181022-174819: When is it that we've found all syzygies? (2)

181004-182041: When is it that we've found all syzygies?

180905-175949: Another syzygy?

180821-173800: A shift relation of $E$? (2)

180715-105501: A shift relation of $E$?

180709-162515: $\epsilon$-expansions.

180708-164624: The relations of $CD_a$.

180708-155308: Back to syzygys (2).

180708-150012: Back to syzygys.

180708-130553: $\lambda$-expansions.

180504-142613: Is one equation enough?

180409-091836: Supervisory committee meeting.

180313-173113: A simpler approach to 4Ts.

180309-173743: A monoidal relation?

180220-173256: A further relation?

180205-160529: Further syzygies (3).

180125-175456: Further syzygies (2).

180125-174451: Further syzygies.

171216-105828: $e$, $d$, and a new syzygy.

171205-113512: Some dimensions for $dE=0$, and figuring out degree 1.

171203-170202: Crunching with $dE$ (6).

171203-152357: Crunching with $dE$ (5).

171203-152021: Crunching with $dE$ (4).

171203-151534: Crunching with $dE$ (3).

171202-134501: Crunching with $dE$ (2).

171202-124538: Crunching with $dE$.

171127-170712: 4T away from strand 0.

171126-131903: The chord-slide relation.

171126-115232: Degree 1 braidors.

171125-151406: Relations in $CD_a$ (4).

171123-193421: Relations in $CD_a$ (3).

171123-180923: Relations in $CD_a$ (2).

171120-184518: Relations in $CD_a$.

171023-164655: More on the trapezoid coproduct.

171005-175959: Conjugations.

170925-170346: $\pi$ is irrational.

170919-165856: On Lochak-Schneps "The Grothendieck-Teichmuller group and automorphisms of braid groups" (3).

170919-164604: On Lochak-Schneps "The Grothendieck-Teichmuller group and automorphisms of braid groups" (2).

170919-162638: On Lochak-Schneps "The Grothendieck-Teichmuller group and automorphisms of braid groups".

170801-165731: Reshetikhin's quantization (2).

170801-163748: Reshetikhin's quantization.

170721-165948: The bch coproduct.

170718-165111: Cuaps in B-land.

170711-172602: The bracket in GT.

170626-161203: Annular v&w, annular vertices.

170601-153529: The trapezoid co-product (2).

170404-163258: Lessons from Lochak-Schneps.

170310-170245: Tangles and traces and links.

170224-131331: Normal ordering for annular gl(N).

170214-153807: Traces.

170131-163029: The HOMFLY braidor algebra.

170112-175805: The trapezoid co-product.

161206-173055: Universal universal algebras.

161121-163537: $CD_a$ relations.

161026-091446: Reps and div.

161003-170636: Reps and sder.

160927-175506: Reps and tder.

160920-170740: Twisting braidors.

160915-183646: Re-listening to Les Diablerets talk (2).

160915-175913: Re-listening to Les Diablerets talk.

160914-170727: A relation between braidors and KV?

160819-173051: Being primitive.

160818-160344: What are we preserving?

160811-174219: Proving classical -> semi-classical (2).

160811-172336: Proving classical -> semi-classical.

160809-174502: The braidor GRT (4).

160808-165905: The braidor GRT (3).

160804-180433: The braidor GRT (2).

160726-144247: The braidor GRT.

160628-155459: The differential in the braidors case.

160628-153807: The Quillen filtration for annular braids.

160615-160311: BRBR=RBRB.

160608-160145: GRT for braidors.

160530-154939: The gl(n) map of trees into disks.

160519-140237: Extendibles extend to extendibles?

160512-162736: Twisting braidors.

160421-165557: Computing homologies using beads.

160415-180821: FA and FL.

160411-165619: The maps we are considering.

160408-143441: Meeting with Jeffrey.

160404-155602: Permutations acting on ${\mathcal A}_3$.

160310-141731: Associators are equivalent to braidors!!? (2)

160303-142942: Associators are equivalent to braidors!!?

160218-144045: A braidor movie (9).

160218-143911: A braidor movie (8).

160218-143749: A braidor movie (7).

160218-143624: A braidor movie (6).

160218-143510: A braidor movie (5).

160218-143410: A braidor movie (4).

160218-143304: A braidor movie (3).

160218-143014: A braidor movie (2).

160218-141904: A braidor movie.

160211-135547: Linearization of braidor matters (2).

160204-143624: Linearization of braidor matters.

160114-150604: The braidor equations.

151208-132953: $\Box$ and $\Box^\ast$.

151127-153036: The Goussarov-associated-graded for annular braids (2).

151127-145415: The Goussarov-associated-graded for annular braids.

151120-153018: Shielded tangles.

151113-161135: Watching Caen/Brochier.

151106-153708: Pure annular braids.

151106-150325: Annular braids.

151030-163235: The commutator subgroup of a free group.

151023-123115: Furusho on the double shuffle Lie algebra (2).

151023-112409: Furusho on the double shuffle Lie algebra.

151016-170855: Musings on periodic knots.

151002-155435: OC in a circuit algebra.

151002-144503: $\Delta(y_i)=\sum_{j+k=i}y_j\otimes y_k$.

150923-183209: Understanding $\partial s$ (2).

150923-182516: Understanding $\partial s$.

150917-174728: krv (2).

150917-165853: krv.

150910-172307: The structure of $PwB_n$.

150617-153216: Associators and tetrahedra.

150520-180935: Knot theory in $S^2\times S^1\times I$.

150506-150945: The associated graded of a crossed module.

150324-180753: Reducible BRST (2).

150324-174313: Reducible BRST.

150317-180024: Base BRST following Mnev's thesis.

150224-175715: The action groupoid.

150203-174023: Constructing Thom classes.

150203-165259: Intersection graphs.

150121-172802: The quotient of a manifold by a group action (2).

150121-162146: The quotient of a manifold by a group action.

141209-144142: The Aarhus story.

141104-164520: Introduction to BV following Gwilliam (3).

141104-162422: Introduction to BV following Gwilliam (2).

141104-161748: Introduction to BV following Gwilliam.

141014-175340: Is $Z^w$ a 2-holonomy?

141007-182625: The free differential cross module over $\partial_0\colon S\to{\mathfrak g}$ (3).

141007-182414: The free differential cross module over $\partial_0\colon S\to{\mathfrak g}$ (2).

141007-174713: The free differential cross module over $\partial_0\colon S\to{\mathfrak g}$.

141007-173217: 2-holonomies (2).

140917-163816: 2-holonomies.

140731-150413: The group of flying trefoils.

140725-144617: From groups to Lie algebras.

140725-141517: Crossed modules.