- Routines related to the topic "Matrix Extension with Symmetry in Algebraic Number Fields".
- Given an orthogonal low-pass filter (mask) with symmetry and with coefficient in an algebraic
number field Q(t1,t2,...,tn), provide a systematic way to construct its high-pass filters
with symmetry so that they form a filter bank with the perfect reconstruction property and whose
coefficients also in the algebraic number field Q(t1,t2,...,tn) up to multiplication of constants.
- Can be applied to the construction of tight framelets.
- Invoke "D1Utilities" and "D1MatOrthExt".