Journal of Classical Analysis · Volume 21, Issue 1 Functions of (ϕ,ψ)-bounded variation and its double Walsh-Fourier coefficients 21-01 Pages 1-7 DOI 10.7153/jca-2023-21-01 Downloads Short PDF Full PDF PNG Authors K. N. Darji R. G. Vyas Keywords order of magnitude of double Walsh-Fourier coefficients functions of (ϕ,ψ)-bounded variation Subject classes 42C10 42B05 26B30 26D15