I welcome you to the fourth issue of the IEEE Communications Surveys and Tutorials in 2021. This issue includes 23 papers covering different aspects of communication networks. In particular, these ...

(eq x y) is true if and only if x and y are the same identical object. (Implementationally, x and y are usually eq if and only if they address the same identical memory location.) It should be noted ...

An association list, or a-list, is a data structure used very frequently in Lisp. An a-list is a list of pairs (conses); each pair is an association. The car of a pair is called the key, and the cdr ...

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