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Reference.org
q-difference polynomial
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<p>In <a href="/facts/Combinatorics/k14xUoKT">combinatorial</a> <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, the <i>q</i>-difference polynomials or <i>q</i>-harmonic polynomials are a <a href="/facts/Polynomial_sequence/JaH5aGcH">polynomial sequence</a> defined in terms of the <a href="/facts/Q-derivative/s6LFJgSJ"><i>q</i>-derivative</a>. They are a generalized type of <a href="/facts/Brenke_polynomial/VLeKNJ4G">Brenke polynomial</a>, and generalize the <a href="/facts/Appell_polynomial/7hEeFjzM">Appell polynomials</a>. See also <a href="/facts/Sheffer_sequence/CpjBBWcM">Sheffer sequence</a>. </p>