forked from kscience/kmath
27 lines
1.1 KiB
Markdown
27 lines
1.1 KiB
Markdown
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# Expressions
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**Experimental: this API is in early stage and could change any time**
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Expressions is an experimental feature which allows to construct lazily or immediately calculated parametric mathematical
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expressions.
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The potential use-cases for it (so far) are following:
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* Lazy evaluation (in general simple lambda is better, but there are some border cases)
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* Automatic differentiation in single-dimension and in multiple dimensions
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* Generation of mathematical syntax trees with subsequent code generation for other languages
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* Maybe symbolic computations (needs additional research)
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The workhorse of this API is `Expression` interface which exposes single `operator fun invoke(arguments: Map<String, T>): T`
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method. `ExpressionContext` is used to generate expressions and introduce variables.
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Currently there are two implementations:
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* Generic `ExpressionField` in `kmath-core` which allows construction of custom lazy expressions
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* Auto-differentiation expression in `kmath-commons` module allows to use full power of `DerivativeStructure`
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from commons-math. **TODO: add example**
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