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Results tagged with reference-request
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user 481351
This tag is used if a reference is needed in a paper or textbook on a specific result.
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Is a function looking like a cubic cusp globally equivalent to the cubic cusp?
Let's consider a family of smooth odd functions $\phi_v(u)\colon \mathbb{R}^2\to\mathbb{R}$, which ,looks like' a family of functions $f_y(x)=x^3-yx$ in the vicinity of $(0,0)$: $\phi_v(u)$ has no cri …
