= Cohen-Daubechies-Vial interval wavelet construction
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This construction adapts compactly supported orthonormal <wavelets> to an interval by finite changes near its endpoints. It preserves local support, polynomial reproduction, nested approximation spaces and orthogonal detail spaces. The resulting basis contains coarse <scaling functions>, unchanged interior <wavelets>, and finitely many <boundary wavelets> per endpoint and per scale, without forcing periodic or zero boundary values.
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