Soler's Theorem and Characterization of Inner Product Spaces

Gleason's theorem and completeness of inner product spaces

Generalization of Wigner's Unitary-Antiunitary Theorem for Indefinite Inner Product Spaces

Test spaces, dacey spaces, and completeness of inner product spaces

Regular measures and inner product spaces

Measures on the Splitting Subspaces of an Inner Product Space

States on Subspaces of Inner Product Spaces with the Gleason Property