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Natural Science, Biology, 2024, 14, 67–75
DOI: 10.xxxx/example-doi Special Issue 1(2), 2022 186–1928

ON QUASI-UNIVERSAL WALSH SERIESINLp[0,1],p∈[1,2]

Received N/A; revised N/A; accepted N/A
CC BY-NC 4.0 This work is licensed under Creative Commons Attribution–NonCommercial International License (CC BY-NC 4.0).

Let the sequence{ak}∞k=1,ak↘0 with{ak}∞k=1/∈l2,and Walsh system{Wk(x)}∞k=0be given.Then for anyε>0 there exists a measurable setE⊂[0,1]with measure|E|>1−εand numbersδk=±1,0 such that foranyp∈[1,2]and each functionf(x)∈Lp(E)there exists a rearrangementk→σ(k)such that the series∞∑k=1δσ(k)aσ(k)Wσ(k)(x)converges tof(x)in thenorm ofLp(E).

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