ChineseRemainder[{r_1, r_2, ...}, {m_1, m_2, ...}] gives the smallest non-negative x that satisfies all the integer congruences x mod m_i = r_i mod m_i.

Chop[expr] replaces approximate real numbers in expr that are close to zero by the exact integer 0.

ClearAll[symb_1, symb_2, ...] clears all values, definitions, attributes, messages, and defaults associated with symbols. ClearAll["form_1 ", "form_2", ...] clears all ...

Clear[symbol_1, symbol_2, ...] clears values and definitions for the symbol_i. Clear["form_1", "form_2", ...] clears values and definitions for all symbols whose names match ...

ClusteringComponents[array] gives an array in which each element of array is replaced by an integer index representing the cluster in which the element ...

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

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

ColorFunction is an option for graphics functions that specifies a function to apply to determine colors of elements.

Commonest[list] gives a list of the elements that are the most common in list.Commonest[list, n] gives a list of the n most common elements in list.

CompleteGraphQ[g] yields True if the graph g is a complete graph, and False otherwise.CompleteGraphQ[g, vlist] yields True if the subgraph induced by vlist is a complete ...