1. Critical sets in 3-space

   • Matthew Grayson
   • Charles Pugh

   OriginalPaper Pages: 5 - 61

2. Biquaternion algebras and quartic extensions

   • Tsit Yuen Lam
   • David B. Leep
   • Jean-Pierre Tignol

   OriginalPaper Pages: 63 - 102

3. Projective varieties with non-residually finite fundamental group

   • Domingo Toledo

   OriginalPaper Pages: 103 - 119

4. Quantum invariants of links and 3-valent graphs in 3-manifolds

   • Vladimir Turaev

   OriginalPaper Pages: 121 - 171