Wikipedia:Articles for deletion/Eigenclass model
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This article is an orgy of original research.
"Eigenclass" is a term used among Ruby developers to describe the shim class created internally to support per-instance methods. Even within Ruby, it's not a core concept that's essential to grasp in order to be able to use or reason about the language. The Ruby article mentions the pattern in passing by its pragmatic, unfancy name: singleton methods.
This article gives the false impression that this language-specific feature (AFAICT, even Smalltalk has no built-in support for it) is an established topic in computer science.
The vast bulk of the article is unreferenced. Those references that do exist fall into three categories a) links to Ruby documentation b) links to articles that don't mention "eigenclass" or "eigenclass model" in any way and c) links to a single non-notable site that appears to contain the same material as the article.