J. M. Almira

collaborators

4 papers

math.DG2011

Riemannian Geometry and the Fundamental Theorem of Algebra

J. M. Almira, A. Romero

If a (non-constant) polynomial has no zero, then a certain Riemannian metric is constructed on the two dimensional sphere. Several geometric arguments are then shown to contradict…

math.CA2011

A note on classical and p-adic Fréchet functional equations with restrictions

J. M. Almira

Given X,Y two Q-vector spaces, and f:X -> Y, we study under which conditions on the sets $B_{k} \subseteq X$ , k=1,...,s, if $Δ_{h_{1} h_{2} ... h_{s}} f (x) = 0$ for all x in X and h_k in B_k, k=…

math.CA2011

On strict inclusion relations between approximation and interpolation spaces

J. M. Almira

We study strict inclusion relations between approximation and interpolation spaces.

math.CA2010

A simple observation about compactness and fast decay of Fourier coefficients

J. M. Almira

Let $X$ be a Banach space and suppose $Y \subseteq X$ is a Banach space compactly embedded into $X$ , and $(a_{k})$ is a weakly null sequence of functionals in $X^{*}$ . Then there exists…