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Describe

Function: describe (<string>)

Function: describe (<string>, exact)

Function: describe (<string>, inexact) describe(<string>) is equivalent to describe(<string>, exact).

describe(<string>, exact) finds an item with title equal (case-insensitive) to <string>, if there is any such item.

describe(<string>, inexact) finds all documented items which contain <string> in their titles. If there is more than one such item, Maxima asks the user to select an item or items to display.

At the interactive prompt, ? foo (with a space between ? and foo) is equivalent to describe("foo", exact), and ?? foo is equivalent to describe("foo", inexact).

describe("", inexact) yields a list of all topics documented in the on-line manual.

describe quotes its argument. describe returns true if some documentation is found, otherwise false.

See also *note Documentation::.

Example:

          (%i1) ?? integ
           0: Functions and Variables for Elliptic Integrals
           1: Functions and Variables for Integration
           2: Introduction to Elliptic Functions and Integrals
           3: Introduction to Integration
           4: askinteger  (Functions and Variables for Simplification)
           5: integerp  (Functions and Variables for Miscellaneous Options)
           6: integer_partitions  (Functions and Variables for Sets)
           7: integrate  (Functions and Variables for Integration)
           8: integrate_use_rootsof  (Functions and Variables for
              Integration)
           9: integration_constant_counter  (Functions and Variables for
              Integration)
           10: nonnegintegerp  (Functions and Variables for linearalgebra)
          Enter space-separated numbers, all or none: 7 8

Function: integrate (<expr>, <x>)

Function: integrate (<expr>, <x>, <a>, <b>) Attempts to symbolically compute the integral of <expr> with respect to <x>. integrate (<expr>, <x>) is an indefinite integral, while integrate (<expr>, <x>, <a>, <b>) is a definite integral, [...]

-- Option variable: integrate_use_rootsof Default value: false

When integrate_use_rootsof is true and the denominator of a rational function cannot be factored, integrate returns the integral in a form which is a sum over the roots (not yet known) of the denominator. [...]

In this example, items 7 and 8 were selected (output is shortened as indicated by [...]. All or none of the items could have been selected by entering all or none, which can be abbreviated a or n, respectively.

(%o1)                                true
(%i2)