Abstract
It is proved that the quasi-grand Lebesgue space \(G\psi _{a,b}\) is not normable. Also, the boundedness of the Hausdorff operator \(\displaystyle H_\varphi (f)(x):= \int _0^\infty \frac{\varphi (y)}{y}f\left( \frac{x}{y}\right) \textrm{d}y\) in the space \(G\psi _{a,b}\) has been investigated for a special case of the function \(\psi _{a,b}\).
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Acknowledgements
The first author acknowledges the MATRICS Research Grant No. MTR/2019/000783 of SERB, Department of Science and Technology, India. The third author acknowledges the JRF Research Grant No. 09/045(1716)/2019-EMR-I of CSIR, India.
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Communicated by Shamani Supramaniam.
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Singh, A.P., Jain, P. & Panchal, R. On Quasi-Grand Lebesgue Spaces and the Hausdorff Operator. Bull. Malays. Math. Sci. Soc. 47, 14 (2024). https://doi.org/10.1007/s40840-023-01618-8
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DOI: https://doi.org/10.1007/s40840-023-01618-8