On the composition of nondegenerate quadratic forms with an arbitrary index

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2. Julian Ławrynowicz, Katarzyna Kędzia, Osamu Suzuki, Supercomplex structures, surface soliton equations, and quasiconformal mappings
3. Julian Ławrynowicz, Jakub Rembieliński, Francesco Succi, Generalized Hurwitz maps of the type S × V → W, anti-involutions, and quantum braided Clifford algebras