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@@ -1455,17 +1455,20 @@ This is the assembly of the ~#:larcs.manipulate~ package. It includes, in corre
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While this isn't exactly /algebra/, differentiation is important mathematically. This is done rather simply using rules to rewrite an initial expression forming the derivative.
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-** WORKING Rule Definition [0/3]
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+** WORKING Rule Definition [1/3]
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:PROPERTIES:
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:CREATED: <2016-06-13 Mon 22:51>
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:END:
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-*** TODO Definition
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+*** DONE Definition
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+CLOSED: [2016-07-19 Tue 20:48]
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:PROPERTIES:
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:CREATED: <2016-06-13 Mon 22:51>
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:ID: de915ee7-47bd-4f7f-ad06-39f0201a4651
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:END:
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+Rules are defined using the ~define-derivative~ macro, which takes an expression type, an arguments list, and a body. If the expression type is not already in the expansions map, it pushes the expression type and expansion name onto the the mapping. Following that, it defines a function for the expansion, using the given arguments list as the lambda-list and the given body for the body for the function.
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+
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#+Caption: Rule Definition
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#+Name: sd-rule-definition
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#+BEGIN_SRC lisp
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