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* [http://ed-thelen.org/comp-hist/APL-hist.html A Personal History of APL] by Michael S. Montalbano | * [http://ed-thelen.org/comp-hist/APL-hist.html A Personal History of APL] by Michael S. Montalbano | ||
* [[File: 1_The_Derivative_Revisited.pdf]] A fresh look at Ken Iverson's 1979 paper "The Derivative Operator" [[Mike Powell]] | * [[File: 1_The_Derivative_Revisited.pdf]] A fresh look at Ken Iverson's 1979 paper "The Derivative Operator" [[Mike Powell]] | ||
* [[File: 2_The_Derivative_Rules.pdf]]In 1979 Ken Iverson wrote a paper on the derivative as part of the ACM APL Conference. That paper included a section summarizing the rules for the derivatives of compound formulations such as f×g. His summary omits the derivation of these rules. This article aims to restate these rules in more modern notation and provide derivations for Iverson's results. [[Mike Powell]] | |||
{{APL community}} | {{APL community}} | ||