Abstract We analyze the forcing notion 𝒫 of finite matrices whose rows consist of isomorphic countable elementary submodels of a given structure of the form 𝐻𝜃. We show that forcing with this poset ...

A well-known problem in numerical ecology is how to recombine presence-absence matrices without altering row and column totals. A few solutions have been proposed, but all of them present some issues ...

Previous work by Verhelst describing an equivalent mathematical argument for analysing binary matrices, but with different implementation and reasoning, was inadvertently omitted from the reference ...