# Irish Mathematical Society

- D. O'Regan
*The 1990 September Meeting*, 1
- D.A. Tipple
*Notice of motion to change the Rules*, 3
- D. O'Donovan
*Graduates Survey- Preliminary Report*, 8
- R.H. Critchley, D.W. Lewis
*IMS/SEFI Joint Meeting 1990*, 13
#### ARTICLES

- P.D. Barry, D.J. Hurley
*A Context for Addition Formulae*, 17
- J. Matier, T.B.M. McMaster
*Total Negation in General Topology*, 26
- James J. Ward
*A Survey of Subnormal Subgroups*, 38
- R. Harte
*Exactness in Elementary Differential Equations*, 51
#### HISTORY

- G.L. Huxley
*On some Mathematical Works in the Library of the Royal Irish Academy*, 60
#### NOTE

- D. MacHale
*Probability in Finite Semigroups*, 64
#### BOOK REVIEWS

- J. Carroll
*Introduction to Linear Algebra by Johnson, Riess and Arnold*, 69
####

- P. Rippon
*Problem Page*, 73