$SessionID is a number set up to be unique to a particular Mathematica session.

MIME type: chemical/x-daylight-smiles SMILES chemical format. Commonly used to describe the structure of chemical molecules. SMILES is an acronym for Simplified Molecular ...

RegionBinarize[image, marker, d] gives a binary version of image that includes the foreground pixels of marker and also connected regions whose pixel values are within a ...

Replace[expr, rules] applies a rule or list of rules in an attempt to transform the entire expression expr. Replace[expr, rules, levelspec] applies rules to parts of expr ...

TextAlignment is an option for Cell, Style and related constructs which specifies how successive lines of text should be aligned.

Type the symbol that will have the subscript. Type x. Create a subscript by pressing the Control key and the - key at the same time.

OrbitInventory[ci, x, w] returns the value of the cycle index ci when each formal variable x[i] is replaced by w. OrbitInventory[ci, x, weights] returns the inventory of ...

The functionality of Algebra`FiniteFields` is now available in the newly created Finite Fields Package.

All the functionality in Calculus`VariationalMethods` is now available through the newly created Variational Methods Package.

All the functionality in Miscellaneous`BlackBodyRadiation` is now available through the newly created Black Body Radiation Package.