Present: Lee, Tom (scribe), Kyle, Jake, Kwaku (hangouts)

Next lab meetings: 7/30/13 and 8/7/13.

Reading: Lee will send around a paper to read for the 8/7/13 meeting.

Lexicase

• Lee’s improvements:
  • Idea: what’s important is case sequences, not cases by themselves.
  • “Condensed” lexicase: Find all of the sets of elites that can be reached through lexicase, and then select one at random and a random individual from that set.
• Paper
  • Rough draft by end of week
  • Ignore population size / test case stuff for now.
• Homologous selection and lexicase together?

Brevis

Speedups are in the works.

Visualization

• Stack traces are looking great!
• Tom will send Jake some stack traces of big (maybe real) programs.

GECCCO Report

• Jeff Clune – discussed connection costs in programs
• Kris Krawiec – GSXover discussion
• Stack-based workshop was small but some interesting ideas
• Leonardo Trujillo – discussion about novelty search to refine fitness function.
  • includes program modality
  • combines advantages of novelty search and guided by error search.