1. Letters to the Editor

   Department 29 April 2009 Pages: 4 - 5

2. Years ago

   • Karen V. H. Parshall

   Department 29 April 2009 Pages: 6 - 11

3. Opinion

   • Jack Cohen
   • Ian Stewart

   Department 29 April 2009 Pages: 12 - 15

4. A portrait of Alfred Tarski

   • Steven R. Givant

   Article 29 April 2009 Pages: 16 - 32

5. Descartes and the philosophy of mathematics

   • Anthony Lo Bello

   Article 29 April 2009 Pages: 35 - 39

6. Circuits in directed grids

   • Joseph A. Gallian

   Article 29 April 2009 Pages: 40 - 43

7. A fractal puzzle

   • G. A. Edgar

   Article 29 April 2009 Pages: 44 - 50

8. Mathematical entertainments

   • David Gale

   Department 29 April 2009 Pages: 53 - 55

9. The mathematics of moderns

   • A. R. Calderbank

   Article 29 April 2009 Pages: 56 - 65

10. The mathematical tourist

    • Ian Stewart

    Department 29 April 2009 Pages: 66 - 67

11. History and variation on the theme of the frobenius reciprocity theorem

    • Floyd L. Williams

    Article 29 April 2009 Pages: 68 - 71

12. Quantum theory and the lattice join

    • James H. McGrath

    Article 29 April 2009 Pages: 72 - 79

13. Reviews

    • Chandler Davis

    Department 29 April 2009 Pages: 81 - 83

14. Stamp corner

    • Robin Wilson

    Department 29 April 2009 Pages: 84 - 84