In geometry, the tangent cone is a generalization of the notion of the tangent space (applied to manifolds in the usual differential geometry setting) to irregular surfaces, that may contain singularities such as angular corners. == Definitions in nonlinear analysis == In nonlinear analysis, there are many definitions for a tangent cone, including the adjacent cone, Bouligand's contingent cone, and the Clarke tangent cone.
In geometry, the tangent cone is a generalization of the notion of the tangent space (applied to manifolds in the usual differential geometry setting) to irregular surfaces, that may contain singularities such as angular corners. == Definitions in nonlinear analysis == In nonlinear analysis, there are many definitions for a tangent cone, including the adjacent cone, Bouligand's contingent cone, and the Clarke tangent cone.
Source: Wikipedia "Tangent cone" · CC BY-SA 4.0
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