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Lineability and spaceability of sets of functions on
Authors:Richard Aron  V I Gurariy  J B Seoane
Institution:Department of Mathematics, Kent State University, Kent, Ohio 44242 ; Department of Mathematics, Kent State University, Kent, Ohio 44242 ; Department of Mathematics, Kent State University, Kent, Ohio 44242
Abstract:We show that there is an infinite-dimensional vector space of differentiable functions on $\mathbb{R} ,$ every non-zero element of which is nowhere monotone. We also show that there is a vector space of dimension $2^c$ of functions $\mathbb{R}\to \mathbb{R} ,$ every non-zero element of which is everywhere surjective.

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