19 research outputs found
Multiplication and Composition in Weighted Modulation Spaces
Full text linkWe study the existence of the product of two weighted modulation spaces. For
this purpose we discuss two different strategies. The more simple one allows
transparent proofs in various situations. However, our second method allows a
closer look onto associated norm inequalities under restrictions in the Fourier
image. This will give us the opportunity to treat the boundedness of
composition operators.Comment: 49 page
Defect distributions applied to differential equations with power function type coefficients
No full textEinige n-parametrige Approximationsverfahren und Charakterisierungen ihrer Favardklassen
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Kolmogorov Widths and Bilinear Approximations of the Classes of Periodic Functions of One and Many Variables
No full textFredholmness property of -elliptic pseudo-differential operator under change variable in its symbol
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