CoefficientArrays[polys, vars] gives the arrays of coefficients of the variables vars in the polynomials polys.

CoefficientList[poly, var] gives a list of coefficients of powers of var in poly, starting with power 0. CoefficientList[poly, {var_1, var_2, ...}] gives an array of ...

Coefficient[expr, form] gives the coefficient of form in the polynomial expr. Coefficient[expr, form, n] gives the coefficient of form^n in expr.

CoefficientRules[poly, {x_1, x_2, ...}] gives the list {{e_11, e_12, ...} -> c_1, {e_21, ...} -> c_2, ...} of exponent vectors and coefficients for the monomials in poly with ...

CoifletWavelet[] represents a Coiflet wavelet of order 2.CoifletWavelet[n] represents a Coiflet wavelet of order n.

Collect[expr, x] collects together terms involving the same powers of objects matching x. Collect[expr, {x_1, x_2, ...}] collects together terms that involve the same powers ...

Colon[x, y, ...] displays as x \[Colon] y \[Colon] ....

ColorCombine[{image_1, image_2, ...}] creates a multichannel image by combining the sequence of channels in the image_i. ColorCombine[{image_1, image_2, ...}, colorspace] ...

ColorConvert[expr, colspace] converts color specifications in expr to refer to the color space represented by colspace.

ColorDataFunction[range, ...] is a function that represents a color scheme.