Present: Lee, Tom (scribe), Daniel, Kwaku (hangouts)

Reading for next meeting: Bill Langdon paper (emailed to list)

People Associated with Lab This Summer

• Lee
• Tom
• Daniel
• Kwaku (remotely)
• Jake?
• Bill
• Kyle
• Ryan and David (new UMass grad students)
• Pratistha (Smith)
• Zeke (GitHub things)

Things for Lee to take note of

• Link to Zeke’s stuff on wiki
• When to have next lab meeting
• Get GPTP slides to Tom soon, preferably by early in the day Monday
• Send Tom calc code to do lexicase case usage visualization

GPTP

• Lee makes slides
• Tag-team presentation
  • Tom describes experiments and results
  • Lee does everything else

Selection

Lee’s new selection: Maximal Polymath selection

• Uses elite cohorts
• Hopes to combat some of lexicase’s problems with number of test cases vs. population size problems.
• Pick random cohort, and then use random individual from that cohort, or use lexicase within that cohort
• Possible issues:
  • Too much elitism?
  • Too much emphasis on weak individuals that do well on single test cases that others do poorly on?

Kwaku visualization stuff

Sounds interesting – Kwaku will get it working and send new link

Upcoming Topics

• ULTRA
  • Synthetic parent trials
  • No-paren ULTRA / push
  • Tree GP ULTRA
• Brevis
• Tags
• Environments
• Keep Cool
• Visualization (Push stack diagrams)