• Tutorial: Adding a new Mathics3 Function
  • Hello, World! – using Predefined
  • Introducing the Builtin Class and Pattern-based Parameter Specification
  • Checking Parameter Counts
  • Adding Help (Information[]) Text
  • Writing Document Tests
  • Working with Multiple Patterns
  • Function Application via Rules
  • Class variables and Function Attributes
  • Emitting Warnings and Errors
• Case Studies for Adding Builtins
  • Defining Variable $MachineName
  • Selecting a Builtin to Add
  • Adding Builtin Undefined
    • Decide where in the code and document to place the code in Mathics3
    • What is Undefined?
    • Is there something similar to Undefined that we can use as an example?
    • First Skeletal version
      • Undefined Title Line
      • Undefined Symbol Definition Description
      • User-Oriented Examples
    • Checking the Skeletal version
    • Completing Undefined
    • Testing Undefined
    • Pytest testing of Undefined
  • Adding Builtin Function KroneckerProduct
    • Finding a corresponding SymPy function and Wikipedia name for KroneckerProduct
    • KroneckerProduct placement in Mathics3
    • KroneckerProduct Basic Skeleton
      • KroneckerProduct Title Line
      • KroneckerProduct Function Definition Description
      • KroneckerProduct Examples
    • Checking the KroneckerProduct[] Skeletal Version
    • Completing KroneckerProduct
      • KroneckerProduct[] skeletal code
      • KroneckerProduct[] class variables
      • KroneckerProduct[] evaluation method
      • KroneckerProduct[] evaluation method, second version
    • Testing KroneckerProduct[]
  • Adding Builtin Function Curl
    • Writing Curl in Mathics
      • Two-dimensional Mathematical Definition
      • Two-dimensional Mathics3 Function
      • Three-dimensional Mathematical Definition
      • Three-dimensional Mathics3 Function
      • Adding Curl as an autoloaded function
      • Testing autoloaded Curl function
    • Curl placement in Mathics3
      • When there is no existing section in Mathics3 already…
    • Find corresponding Sympy, SciPy, mpmath, or NumPy function
    • Basic version of Curl using Rules
      • Basic Curl version
    • Checking the Curl[] Basic Version
    • Finishing up Curl[]
• Guide Sections and Subsections
• Documentation Markup
  • Markup in Documentation
  • Markup for Code Examples
    • Example of >>, =, and = ...
    • Example of #>
    • Examples of S>
    • Example of ##
• Guidelines for Writing Documentation
  • Title
  • Definition Block
  • Extended Description Section
• Thoughts and Experience from Adding Builtins
  • Don’t Reinvent the Wheel
    • Magic-bullet Technology versus Thoughtful Coding
    • Caching Expression cache vs. @lru
  • Don’t Micromanage Python
  • Misuse of Rewrite Rules
  • Overusing Expensive Evaluate