Nice results about quadratic type functional equations on semigroups
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DOI: 10.1007/s00010-019-00653-w
Abstract: Let $$(S,+)$$ ( S , + ) be an abelian semigroup, let $$\sigma $$ σ be an involution of S , let X be a linear space over the field $${\mathbb {K}}\in \{{\mathbb {R}},{\mathbb {C}}\}$$… read more here.
Keywords: quadratic type; nice results; results quadratic; functional equations ... See more keywords