A characterization of continuous associative operations whose graphs are ruled surfaces.
Characterizations of some classes of quasilinear functions with applications to triangular norms and to synthesizing judgements. (Short Communication).
On some Orthogonality Relations in Real Normed Spaces and Characterizations of Inner Products
Using some functionals which fulfil much more general requirements than the usual axioms of inner products and by considering some weak versions of orthogonal relations in real normed spaces we find new characterizations of inner products in the cases of James and Pythagoras orthogonalities but we show that this is not the case when Birkhoff orthogonality is postulated.
Some remarkable lines of triangles in real normed spaces and characterizations of inner product structures.
On a functional equation related to the Ptolemaic inequality.
On the definition of a probalistic normed space. (Summary).
On continuous preservation of norms and areas.
On the definition of a probalistic normed space.
A geometrical proof of a new inequality for the gamma function.
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