Issue no. 1 Table of Contents

Distributions and heat equation in SDG
p. 2-28
Combinatorial stacks and the four-color theorem
p. 29-49
Homotopic pullbacks, Lax pullbacks, and exponentiability
p. 50-80

Issue no. 2 Table of Contents

A construction of 2-filtered bicolimits of categories
p. 83-106
Lax 2-categories and directed homotopy
p. 107-128

Issue no. 3 Table of Contents

Quillen cohomology and Baues-Wirsching cohomology of algebraic, theories
p. 163-205
Erratum
p. 206
Synthetic differential geometry of higher-order total differentials
p. 207-232
A categorical proof of the equivalence of local compactness and exponentiability in locale theory
p. 233-239

Issue no. 4 Table of Contents

Structural properties of endofunctors
p. 242-260
Double clubs
p. 261-317