@cortex-js/compute-engine - npm Package Versions

0.13.0 2023-09-09

New Features

• Compilation Some expressions can be compiled to Javascript. This is useful to evaluate an expression many times, for example in a loop. The compiled expression is faster to evaluate than the original expression. To get the compiled expression, use expr.compile(). Read more at Compiling

Issues Resolved and Improvements

• Fixed parsing and serialization of extended LaTeX synonyms for e and i.
• Fixed serialization of Half.
• Fixed serialization of Which
• Improved serialization of ["Delimiter"] expressions.

0.12.7 2023-09-08

Improvements

• Made customization of the LaTeX dictionary simpler. The ce.latexDictionary property can be used to access and modify the dictionary. The documentation has been updated.

0.12.6 2023-09-08

Breaking Changes

• New API for the Parser class.

Improvements and Bux Fixes

• The ComputeEngine now exports the bignum() and complex() methods that can be used to create bignum and complex numbers from strings or numbers. The methods isBigNum() and isComplex() have also been added to check if a value is a bignum (Decimal) or complex (Complex) number, for example as returned by expr.numericValue.
• #69 \leq was incorrectly parsed as Equals instead of LessEqual
• #94 The \exp command was not parsed correctly.
• Handle PlusMinus in infix and prefix position, i.e. a\pm b and \pm a.
• Improved parsing, serialization
• Improved simplification
• Improved evaluation of Sum and Product
• Support complex identifiers (i.e. non-latin scripts, emojis).
• Fixed serialization of mixed numbers.

0.12.1 2022-12-01

Work around unpckg.com issue with libraries using BigInt.

0.12.0 2022-11-27

Breaking Changes

• The expr.symbols property return an array of string. Previously it returned an array of BoxedExpression.

Improvements

• Rewrote the rational computation engine to use JavaScript bigint instead of Decimal instances. Performance improvements of up to 100x.
• expr.freeVars provides the free variables in an expression.
• Improved performance of prime factorization of big num by x100.
• Added ["RandomExpression"]
• Improved accuracy of some operations, for example expr.parse("1e999 + 1").simplify()

Issues Resolved

• When ce.numericMode === "auto", square roots of negative numbers would return an expression instead of a complex number.
• The formatting of LaTeX numbers when using ce.latexOptions.notation = "engineering" or "scientific" was incorrect.
• The trig functions no longer "simplify" to the less simple exponential formulas.
• The canonical order of polynomials now orders non-lexicographic terms of degree 1 last, i.e. "ax^2+ bx+ c" instead of "x + ax^2 + bx".
• Fixed evaluation of inverse functions
• Fixed expr.isLess, expr.isGreater, expr.isLessEqual, expr.isGreaterEqual and ["Min"], ["Max"]

0.11.0 2022-11-18

Breaking Changes

• The signature of ce.defineSymbol(), ce.defineFunction() and ce.pushScope() have changed

Improvements

• When a constant should be held or substituted with its value can now be more precisely controlled. The hold symbol attribute is now holdUntil and can specify at which stage the substitution should take place.

Issues Resolved

• Some constants would return a value as bignum or complex even when the numericMode did not allow it.
• Changing the value or domain of a symbol is now correctly taken into account. Changes can be made with ce.assume(), ce.set() or expr.value.
• When a symbol does not have a value associated with it, assumptions about it (e.g. "x > 0") are now correctly tracked and reflected.