User Guide

• Introduction to the Semantic Pointer Architecture
  • Structured representations
  • An example: Spaun
• Introduction to NengoSPA
  • Hello world
  • SPA syntax
    • Symbols
    • Action selection
  • Using Transcode for computation
  • Using the config system with NengoSPA
  • Vocabularies
    • Creating subsets of vocabularies
    • Using vocabularies
    • Strict mode
    • Converting between vocabularies
  • Clean up memories
  • What is next?
• Transitioning to nengo_spa coming from the core Nengo legacy SPA implementation
  • Why switch to nengo_spa?
    • Support for action rules of arbitrary complexity
    • “Type safety” in action rules
    • The neural representations optimized for better accuracy
    • New Python-based syntax
    • Support for algebras
    • Other features
  • Importing nengo_spa
  • Rule 1 of using nengo_spa
  • A basic model
  • Transcode
  • Action rules
  • Vocabularies
  • nengo_spa and the config system
  • Semantic Pointers
  • Representing identity
  • New associative memory classes
• Implementing a custom module
• Algebras
• Advanced: fractional binding
  • Semantic Pointer signs
  • Desirable properties for exponentiated Semantic Pointers
  • Exponentiation laws
  • Negative exponents and approximate inverses
  • References