MathSciNet bibliographic data MR783999 26A15 Wójtowicz, Zygmunt The typical structure of the sets \$\{x\colon\;f(x)=h(x)\}\$$\{x\colon\;f(x)=h(x)\}$ for \$f\$$f$ continuous and \$h\$$h$ Lipschitz. Trans. Amer. Math. Soc. 289 (1985), no. 2, 471–484. Article

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