Tr[list] finds the trace of the matrix or tensor list. Tr[list, f] finds a generalized trace, combining terms with f instead of Plus. Tr[list, f, n] goes down to level n in ...

VertexQ[g, v] yields True if v is a vertex in the graph g and False otherwise.

While[test, body] evaluates test, then body, repetitively, until test first fails to give True.

Mathematica stores preference settings and initialization data in two directories, $BaseDirectory and $UserBaseDirectory. Within each of these directories are several ...

Mathematica by default interprets any sequence of letters or letter-like forms as the name of a symbol. All these are treated by Mathematica as symbols. Symbols with built-in ...

Many aspects of the Mathematica front end such as the styles of cells, the appearance of notebooks, or the parameters used in typesetting are controlled by options. For ...

SQLDelete[conn, table] deletes the data in a table in an SQL connection.SQLDelete[conn, table, cond] deletes data that matches cond.

SQLDropTable[conn, table] drops a table in an SQL connection.

DatabaseLink contains a number of example databases (many use HSQLDB). These allow you to try examples in the documentation and learn the details of working with databases in ...

JavaShow[window] causes the specified Java window to be brought to the foreground, so that it appears in front of notebook windows.