Differentiable functions in associative and alternative algebras and smooth surfaces in projective spaces over these algebras
Surfaces of Constant Curvature and Geometric Interpretations of the Klein-gordon, Sine-gordon and Sinh-gordon Equations
Spaces with exceptional fundamental groups.
Geometric interpretations of some Jordan algebras.
Homogeneous -symmetric spaces of interior type with simple real fundamental groups and their connection with parabolic spaces.
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