A sign assignment in totally twisted Khovanov homology

We lift the characteristic-2 totally twisted Khovanov homology of Roberts and Jaeger to a theory with integer coefficients. The result is a complex computing reduced odd Khovanov homology for knots. This complex is equivalent to a spanning-tree complex whose differential is explicit modulo a sign ambiguity coming from the need to choose a sign assignment in the definition of odd Khovanov homology.Comment: 12 pages; 5 figure

Single-desk marketing: assessing the economic arguments

Single-Desk Marketing: Assessing the Economic Arguments identifies the potential benefits and costs and the strengths and weakness of various arguments in favour of current single-desk arrangements. It does not attempt to quantify the costs and benefits of arrangements in any particular industry.single-desk - marketing boards - deregulation - wheat - cotton - wine - citrus - National Competition Policy