## Scientific General Events

Equivariant Lefschetz invariants via analysis

The PNWNAS has been an annual event since 1987, held on a Saturday each fall.

For more information, please visit the official website at:

The mathematical community is recognizing that besides being a valuable numerical and experimental tool, computation is an important object of mathematical study in its own right and an important theoretical tool as well as a source of new and exciting problems for mathematics. The objective of this workshop is to address the opportunity to further the development of the relationship between number theory, experimentation, and computation and to shape the mathematical framework in which the intellectual content of this relationship is studied. We will concentrate our workshop in the areas of the arithmetic of curves over number fields, special values of L–series, diophantine equations, the LLL algorithm, Mahler measure, irreducibility and related problems.

The Workshop on Selected Areas in Cryptography (SAC) is an annual conference dedicated to specific themes in the area of cryptographic system design and analysis.

For more information, please visit the official website at:

The Alberta Topology Seminar (ATS) retreat will be held at the Goldeye resort outside Nordegg, AB.

This meeting focuses on unsolved problems in low-dimensional homotopy theory

and combinatorial group theory. These include Whitehead's Asphericity

Conjecture, the Andrews-Curtis Conjecture, Wall's Domination Problem in

dimension two, the relation gap problem, and the Eilenberg-Ganea Conjecture.

This seminar is in succession to similar conferences held in Luttach (Italy),

the Pacific Northwest, and Russia.The workshop format emphasizes detailed discussion of ideas in progress and

collaboration of the participants, from advanced graduate students to

early-career researchers to senior experts.Update 15 May 2009: The National

Science Foundation, Division of Mathematical Sciences, has awarded Portland

State University a grant for participant support (partial subsidies towards

travel expenses), and the Pacific Institute for the Mathematical Sciences has

granted supplementary support for the same purpose.