Single assignment is the only form of assignment available in purely functional languages, such as Haskell, which do not have variables in the sense of imperative programming languages
2.
Linear type systems allow function is a form of assignment, as the function parameter will be assigned the value inside the function, and therefore such use of a reference also causes it to go out of scope.
3.
It appears to cite a solid number of reliable sources, and unless there is something wrong that I'm not seeing it probably passes the WP : GNG . Although Wikipedia is not an ideal setup to write papers with, there are tons of classes that use Wikipedia for some form of assignment and there is nothing wrong with that-the WP : USPP encourages such and is explicitly endorsed by the Wikimedia Foundation . ( Also, the link you provided to WP : NOT PAPERS doesn't actually deal with this . . it just says WP is not a place to post OR or technical papers-and this doesn't appear to be one .)
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