Sommaire du Fascicule no. 1

Contents
Quasitrivial semimodules. III.
p. 3-13
On separating sets of words. II.
p. 15-28
Various subsemirings of the field $\Bbb Q$ of rational numbers
p. 29-59
Various examples of parasemifields
p. 61-72
Groupoids and the associative law IIIA. (Primitive extensions of SH-groupoids and their semigroup distances)
p. 73-82

Sommaire du Fascicule no. 2

Foreword
Lectures on ideal dichotomy
p. 5-22
Forcing when there are large cardinals: An introduction
p. 23-32
Hausdorff gaps reconstructed from Luzin gaps
p. 33-38
On relations among metric derived numbers
p. 39-47