It gives us great pleasure to honour, on the occasion of his seventieth birthday, our friend and
mentor Saunders MacLane; and to acknowledge that our interest in coherence problems …

We consider a 2-monad T with rank on a complete and cocomplete 2-category, and write T-Alg
for the 2-category given the T-algebras, the morphisms preserving the structure to within …

INTRODUCTION Ehresmann’s notion of the category of algebras defined by a (projective)
sketch, along with the elementary properties of such categories and the basic relations …

The mammalian innate immune system is activated by foreign nucleic acids. Detection of
double-stranded DNA (dsDNA) in the cytoplasm triggers characteristic antiviral responses and …

The specification of the vertebrate body plan is dependent on numerous signaling molecules,
including members of the Wnt family. We have identified two zebrafish wnt8 paralogs …

The zebrafish has long been the favorite organism in many scientific disciplines. Although
its attributes as a model were expounded for many years and thus were no secret, the …

An action∗: V× A−→ A of a monoidal category V on a category A corresponds to a strong
monoidal functor F: V−→[A, A] into the monoidal category of endofunctors of A. In many …

Many important 2-categories — such as Lex, Fib/ B , elementary toposes and logical
morphisms, the dual of Grothendieck toposes and geometric morphisms, locally-presentable …

Formation of the vertebrate axis may involve a Wnt signaling cascade similar to the Drosophila
wingless pathway. Zebrafish wnt8 is a candidate for involvement in axis specification …

The Wnts are a family of secreted glycoproteins involved in cell-cell signalling and pattern
formation during development, although the extent to which various Wnts are functionally …