New posts in Functional Analysis

Convolution must be a bounded bilinear operator if it is well-defined

Example of a linear onto map which is not open

inequality for positive contraction operator

Bounded projector in Hilbert space

Is there a coordinate-free definition of a differential operator?

When does the center of a set of points lie in the convex hull?

Using Functional Analysis for Differential Equations

How to show convolution is associative?

Hilbert space has countable basis

On the proof of Heisenberg's uncertainty principle