Combinatorial auctions are in which bids can be submitted on sets of items, rather than just individual items. These generally beneficial to both auctioneers and bidders, as they allow bidders express their synergies for In recent years, we have seen the advent combinatorial well emergence online market platforms with competing auctioneers. However, largely been absent from these platforms. Our...

We obtain combinatorial model categories of parametrised spectra, together with systems base change Quillen adjunctions associated to maps parameter spaces. work simplicial objects and use Hovey's sequential symmetric stabilisation machines. By means a Grothendieck construction for categories, we produce controlling the totality stable homotopy theory. The global category spectra is equipped mo...