FindIndependentVertexSet[g] finds an independent vertex set of the graph g with a maximum number of vertices.
HoldFirst is an attribute which specifies that the first argument to a function is to be maintained in an unevaluated form.
MinDetect[image] gives a binary image in which white pixels correspond to constant extended minima in image.MinDetect[image, h] finds extended minima where the range of ...
PermutationLength[perm] returns the number of integers moved by the permutation perm.
Protect
(Built-in Mathematica Symbol) Protect[s_1, s_2, ...] sets the attribute Protected for the symbols s_i. Protect["form_1", "form_2", ...] protects all symbols whose names match any of the string patterns ...
Rationals represents the domain of rational numbers, as in x \[Element] Rationals.
Unprotect[s_1, s_2, ...] removes the attribute Protected for the symbols s_i. Unprotect["form_1", "form_2", ...] unprotects all symbols whose names textually match any of the ...
IntegerDigits[n] gives a list of the decimal digits in the integer n. IntegerDigits[n, b] gives a list of the base b digits in the integer n. IntegerDigits[n, b, len] pads ...
PermutationProduct[a, b, c] gives the product of permutations a, b, c.
In a statement like x^4+x^2>0, Mathematica treats the variable x as having a definite, though unspecified, value. Sometimes, however, it is useful to be able to make ...