High Quality Content by WIKIPEDIA articles! A crunode is a point where a curve intersects itself so that both branches of the curve have distinct tangent lines. For a plane curve, defined as the locus of points f(x, y) = 0, where f(x, y) is a smooth function of variables x and y ranging over the real numbers, a crunode of the curve is a singularity of the function f. In mathematical analysis, a differentiability class is a classification of functions according to the properties of their...
High Quality Content by WIKIPEDIA articles! A crunode is a point where a curve intersects itself so that both branches of the curve have distinct tangent lines. For a plane curve, defined as the locus of points f(x, y) = 0, where f(x, y) is a smooth function of variables x and y ranging over the real numbers, a crunode of the curve is a singularity of the function f. In mathematical analysis, a differentiability class is a classification of functions according to the properties of their derivatives. Higher order differentiability classes correspond to the existence of more derivatives. Functions that have derivatives of all orders are called smooth.
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