Logic Life Search: Difference between revisions
m speed results aren't really in yet, but early trials look very hopeful |
Apple Bottom (talk | contribs) m →Mechanism: minor grammar fix |
||
| Line 9: | Line 9: | ||
==Mechanism== | ==Mechanism== | ||
LLS works by converting pattern searches to boolean satisfiability (SAT) problems, then employing an external SAT solver (e.g. MiniSAT, Lingeling or Glucose) to solve the SAT problem, and | LLS works by converting pattern searches to boolean satisfiability (SAT) problems, then employing an external SAT solver (e.g. MiniSAT, Lingeling or Glucose) to solve the SAT problem, and converting the solution to [[RLE]] format. Although SAT solving is [https://en.wikipedia.org/wiki/NP-completeness NP-complete], many practical problems can be solved swiftly by SAT solver tools, making this a viable approach to [[Life]] pattern searching. | ||
==Also see== | ==Also see== | ||
Revision as of 18:52, 30 January 2018
| Logic Life Search | |
| Homepage | Click here |
|---|---|
| Purpose | Search for patterns |
| Created by | Oscar Cunningham |
| Platform | Unix; platform-independent |
Logic Life Search (abbreviated as LLS) is a program to search for patterns in Conway's Game of Life and other cellular automata by use of a SAT solver, written in Python. LLS is similar to lifesrc, WinLifeSearch and JavaLifeSearch, but offers more flexibility than these. The difference in underlying search methods means that LLS may sometimes be slower than lifesrc to find the same solution, but in many cases with the right optimization it can also be very much faster.
Mechanism
LLS works by converting pattern searches to boolean satisfiability (SAT) problems, then employing an external SAT solver (e.g. MiniSAT, Lingeling or Glucose) to solve the SAT problem, and converting the solution to RLE format. Although SAT solving is NP-complete, many practical problems can be solved swiftly by SAT solver tools, making this a viable approach to Life pattern searching.
Also see
- Tutorials/LLS — for information on how to install, configure, test, and use LLS.
External links
- Logic Life Search on GitHub
- Logic Life Search (discussion thread) at the ConwayLife.com forums