(poly): multiplicity of a mask.__Multiplicity__(poly): support of a mask__D1Support__(symb,multi,ldeg,hdeg): generate mask in matrix polynomial form with multiplicity "multi", support = [ldeg,hdeg].__D1GenPolyMask__(poly): the symmetry operator__SYM__

=(poly,d,c) : the polyphase vector of a mask a,__D1Polyphase__(Pa,d,c) : construct mask from its polyphase vector.__D1Polyphase2Mask__(poly,choice): print the mask in coefficients form__D1PrintMask__(poly): generate mask coefficients for Matlab__D1MaskForMatlab__(poly): a set of equations with respect to the coefficients of a matrix polynomials.__D1Matrix2Set__(poly,d): the orthogonal condition of the mask as a set of equations,__D1OrthEqs__(poly): simplify coefficients of a matrix mask__D1CoeffSimp__: the Dirac delta sequence__delta(k)__(poly,d,symP1,symP2): symmetry conditon on the mask as a set of equation.__D1SymEqs__

a_{i,j}(z) = \epsilon_{i,j}z^{dc_i-c_j}a_{i,j}(1/z).: return the m-th coset a^[m](z) as in D1Polyphase.__D1GetCoset(poly,d,m,c)__(poly,d): return the symmetry centers of mask c_i, i=1,..r as in D1SymEqs.__D1GetSymCenter__(poly,d,sumrule): the L2-smoothness of a mask,υ Only work for multiplicity r=1.__D1Nu2Mask__(polya,polyb,d,c): check whether 2 mask a and b are dual to each other. If return constant*IdentityMatrix, then it is true.__D1IsDual__

**List of Commands**

For a matrix polynomial, it act on each entries.