New posts in Topological Vector Spaces

In a Banach space, can there be a closed subspace which does not have a closed complement?

Bounded linear map which is not continuous

Finite dimensional topological vector space non complete

why a subspace is closed?

Why are weak topologies useful in functional analysis?

Orbit of a matrix can generates a basis?

Is the topology that has the same sequential convergence with a metrizable topology equivalent as that topology?

Every Topological Vector Space is Regular

Is every seminorm induced by a linear operator into a normed space?

Closure of interior of closed convex set