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Biorthogonal system: Projection & Overview
In mathematics, a biorthogonal system is a pair of indexed families of vectors v ~ i in E and u ~ i in F {\displaystyle {\tilde {v}}_{i}{\text{ in }}E{\text{ and }}{\tilde {u}}_{i}{\text{ in }}F} such that ⟨ v ~ i , u ~ j ⟩ = δ i , j , {\displaystyle \left\langle {\tilde {v}}_{i},{\tilde {u}}_{j}\right\rangle =\delta _{i,j},} where E {\displaystyle E}…
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