QPochhammer[a, q, n] gives the q-Pochhammer symbol (a; q) n.QPochhammer[a, q] gives the q-Pochhammer symbol (a; q) \[Infinity].QPochhammer[q] gives the q-Pochhammer symbol ...

QPolyGamma[z, q] gives the q-digamma function \[Psi]_q (z).QPolyGamma[n, z, q] gives the n\[Null]^th derivative of the q-digamma function \[Psi]_q^(n)(z).

QRDecomposition[m] yields the QR decomposition for a numerical matrix m. The result is a list {q, r}, where q is an orthogonal matrix and r is an upper-triangular matrix.

QuadraticIrrationalQ[x] gives True if x is a quadratic irrational and False otherwise.

Quantile[list, q] gives the q\[Null]\[Null]^th quantile of list. Quantile[list, {q_1, q_2, ...}] gives a list of quantiles q_1, q_2, .... Quantile[list, q, {{a, b}, {c, d}}] ...

QuantilePlot[list] generates a plot of quantiles of list against the quantiles of a normal distribution.QuantilePlot[dist] generates a plot of quantiles of the distribution ...

Quartics is an option for functions that involve solving algebraic equations that specifies whether explicit forms for solutions to quartic equations should be given.

QuartileDeviation[list] gives the quartile deviation or semi-interquartile range of the elements in list.QuartileDeviation[dist] gives the quartile deviation or ...

QuartileSkewness[list] gives the coefficient of quartile skewness for the elements in list.QuartileSkewness[dist] gives the coefficient of quartile skewness for the symbolic ...

Quartiles[list] gives a list of the 1/4, 1/2, and 3/4 quantiles of the elements in list.Quartiles[dist] gives a list of the 1/4, 1/2, and 3/4 quantiles of the symbolic ...