Let be a set of LInear functionals [tex] U_{n}[f] [/tex] n=1,2,3,4,.........(adsbygoogle = window.adsbygoogle || []).push({});

so for every n [tex] U_{n}[\lambda f+ \mu g]=\lambda U_{n}[f]+\mu U[g] [/tex] (linearity)

the question is if we can define the product of 2 linear functionals so

[tex] U_{i}U_{j}[f] [/tex] makes sense.

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# Product of linear functional

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