1. PDEease
   1. Robert Nelson
   2. A commercial System
   3. Currently only available in 2D
   4. Written in PASCAL
2. PDEase2 -- I
   1. *Only iterative solvers as aimed at PC's
   2. *Accepts a script from user specifying problem and desired output
   3. *Descriptor files define TITLE, EQUATIONS etc
   4. *Simple language to specify geometry
   5. *Generates adaptive irregular finite element meshes
3. PDEase2 -- II
   1. *Doing groundwater simulations for Livermore
   2. *Has ascii text way of specifying equations using curl dt del2 etc.
   3. *can solve eigenvalue problems
   4. *Cost $600 for a PC
   5. *Company is SPDE 510-862-0644 founded in 1991
   6. *Many 2 man years work and 40,000 lines in PDEase2
4. PDEase2 -- III
   1. *Uses linked lists as datastructures
   2. *Switching to C as more portable than Pascal
   3. *current PC's are so powerful, could reconsider emphasis on iterative solvers
   4. *Note have own Conjuagate Gradient, Lanczos solvers(non symmetric) internally written in Pascal for linked list
5. Questions from Audience - I
   1. *Skjellum mentions CMU NSF center which develope chemical engineering PSE's with object oriented design with applicative language*Industry very reluctant to change anything -- including changing to adaptive meshes
   2. *Nelson wrote all of it.Of course built on existing software
6. Questions from Audience - II
   1. *What is marketplace? Just through it out!
   2. *Macsyma Inc handles marketing and first level support
   3. *Not clear if anybody is making money from PDE PSE's
   4. *SPDC not making money
   5. *Set price low to create market!
   6. *There is $100 student version and a swedish professor has written a physics textbook to go with it
7. Questions from Audience -- III
   1. *Claim need to focus on specific market segments e.g. add a chemical engineering wrapper
      1. -General PDE solver has no market!
      2. -Can one compete with special purpose packages from particular field which ought to be more efficient and have precise software n
   Questions from Audience -- IV
   1. *Why don't we set up a Web Site which solves PDE's on demand!Nelson is interested
   2. *Note can build a nice educational resource on the web based on swedish textbook comined with PDEase!