Nearly Radical Quadratic Functional Equations in p -2-Normed Spaces

M. Eshaghi Gordji, H. Khodaei, A. Ebadian and G. H. Kim

Abstract and Applied Analysis, 2012, vol. 2012, 1-10

Abstract:

We establish some stability results in 2-normed spaces for the radical quadratic functional equation ð ‘“ ( î ” ∑ ð ‘› ð ‘– = 1 ( ð ‘¥ ð ‘– + 𠑦 ð ‘– ) 2 ) + ð ‘“ ( î ” ∑ ð ‘› ð ‘– = 1 ( ð ‘¥ ð ‘– − 𠑦 ð ‘– ) 2 ) = 2 ∑ ð ‘› ð ‘– = 1 ( ð ‘“ ( ð ‘¥ ð ‘– ) + ð ‘“ ( 𠑦 ð ‘– ) ) and then use subadditive functions to prove its stability in ð ‘ -2-normed spaces.

Date: 2012
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlaaa:896032

DOI: 10.1155/2012/896032

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