Weierstrass functions
Image via Wikipedia Weierstrass functions : " Weierstrass functions Weierstrass functions are famous for being continuous everywhere, but differentiable 'nowhere'" Related articles What do elliptic functions look like? (superconductor.voltage.com) The limiting absorption principle (terrytao.wordpress.com) Identifying Vector Fields (unapologetic.wordpress.com) Continuously Differentiable Functions are Locally Lipschitz (unapologetic.wordpress.com) The Existence and Uniqueness Theorem of Ordinary Differential Equations (statement) (unapologetic.wordpress.com) Blog Post: The hidden power within (e2e.ti.com) Smooth Dependence on Initial Conditions (unapologetic.wordpress.com) Sheaves of Functions on Manifolds (unapologetic.wordpress.com) Bihu Function (stuti1.wordpress.com)