#### Volume 6, issue 3 (2006)

 1 D Bar-Natan, Fast Khovanov Homology Computations 2 D Bar-Natan, Khovanov's homology for tangles and cobordisms, Geom. Topol. 9 (2005) 1443 MR2174270 3 P Freyd, Abelian categories. An introduction to the theory of functors, Harper's Series in Modern Mathematics, Harper & Row Publishers (1964) MR0166240 4 G Kuperberg, Spiders for rank 2 Lie algebras, Comm. Math. Phys. 180 (1996) 109 MR1403861 5 E S Lee, An endomorphism of the Khovanov invariant, Adv. Math. 197 (2005) 554 MR2173845 6 B Mazur, What is $\ldots$ a motive?, Notices Amer. Math. Soc. 51 (2004) 1214 MR2104916 7 J A Rasmussen, Khovanov homology and the slice genus arXiv:math.GT/0402131 8 S M Wehrli, A spanning tree model for Khovanov homology arXiv:math.GT/0409328 9 Wikipedia, Image (category theory) — Wikipedia, The Free Encyclopedia (2006) 10 Wikipedia, Karoubi envelope — Wikipedia, The Free Encyclopedia (2006)