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Initially Known Names

 

Description

Declaring a Protected Name as Local

Description

• 

The following names are known, either as global or environment variables under user control or as names of constants known to certain functions.

Catalan

Catalan's constant = i=0−1i2i+12 and evalf(Catalan) is approximately 0.915965594.

constants

See constants (default is the sequence: false, gamma, infinity, true, Catalan, FAIL, Pi ).

Digits

number of digits carried in floats (default is 10). Digits is an environment variable.

FAIL

unknown truth in the context of Boolean evaluation using three-valued logic.

false

the value false (false) in the context of Boolean evaluation.

gamma

Euler's constant = limni=1n1ilnn and evalf(gamma) is approximately 0.5772156649.

gamma(n)

a series of constants such that gamma(n) = limmk=1mlnknklnmn+1n+1 .  Also known as Stieltjes constants.  gamma(0) = gamma, Euler's constant.

I

complex number such that I^2 = -1 (i). Internally, I is represented as Complex(1).

infinity

name for  used by some library functions.

integrate

initially assigned the function name int.

lasterror

See lasterror.

libname

pathnames of libraries read by Maple.  By default, the root of the standard Maple library.

`mod`

initially assigned the function name modp; for symmetric representation, assign `mod` := mods; (mod is an operator). Mod is an environment variable.

NULL

initialized to the null expression sequence.

Order

truncation order for series (default is 6); see also Order. Order is an environment variable.

Pi

math constant π (pi); use Pi for calculations. evalf(Pi) is approximately 3.14159265.

printlevel

See printlevel (default is 1).  Printlevel is an environment variable.

true

the value true (true) in the context of Boolean evaluation.

undefined

name for undefined used by some library functions.

Declaring a Protected Name as Local

If you prefer to use a protected name, you can do one of the following to avoid getting an error:

• 

Use local to declare a local version of the name

• 

Use unprotect to remove protection from the protected name

Note: It is not recommended that you remove protection from Maple protected names. If you must use a Maple protected name, you should declare a local version of the name.

See Also

constant

Declaring a Protected Name Local

environment

FAIL

infinity

inifcn

int

lasterror

libname

mod

option

printlevel

status

undefined

undocumentednames

 


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