Type Alias SymbolAttributes

Type declaration

• constant: boolean

  If true the value of the symbol is constant. The value or domain of symbols with this attribute set to true cannot be changed.

  If false, the symbol is a variable.

  Default: false

• holdUntil:
      | "never"
      | "simplify"
      | "evaluate"
      | "N"

  If the symbol has a value, it is held as indicated in the table below. A green checkmark indicate that the symbol is substituted.

  | Operation | "never" | "simplify" | "evaluate" | "N" | | :--- | :----- | | canonical()| (X) | | | | | simplify() | (X) | (X) | | | | evaluate() | (X) | (X) | (X) | | | "N()" | (X) | (X) | (X) | (X) |

  Some examples:

  • i has holdUntil: 'never'
  • GoldenRatio has holdUntil: 'simplify' (symbolic constant)
  • x has holdUntil: 'evaluate' (variables)
  • Pi has holdUntil: 'N' (special numeric constant)

  Default: evaluate