Initially Known Names - Maple Programming Help

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Initially Known Names

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 = $\sum _{i=0}^{\mathrm{\infty }}\frac{{\left(-1\right)}^{i}}{{\left(2i+1\right)}^{2}}$ 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 = $\underset{n\to \mathrm{\infty }}{lim}\left(\left(\sum _{i=1}^{n}\frac{1}{i}\right)-\mathrm{ln}\left(n\right)\right)$ and evalf(gamma) is approximately 0.5772156649. gamma(n) a series of constants such that gamma(n) = $\underset{m\to \mathrm{\infty }}{lim}\left(\sum _{k=1}^{m}\frac{{\mathrm{ln}\left(k\right)}^{n}}{k}-\frac{{\mathrm{ln}\left(m\right)}^{n+1}}{n+1}\right)$ .  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 $\mathrm{\infty }$ 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 $\mathrm{\pi }$ (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.