Undefined (Built-in Mathematica Symbol)

Undefined is a symbol that represents a quantity with no defined value.

ValueQ (Built-in Mathematica Symbol)

ValueQ[expr] gives True if a value has been defined for expr, and gives False otherwise.

$Pre (Built-in Mathematica Symbol)

$Pre is a global variable whose value, if set, is applied to every input expression.

$PrePrint (Built-in Mathematica Symbol)

$PrePrint is a global variable whose value, if set, is applied to every expression before it is printed.

$PreRead (Built-in Mathematica Symbol)

$PreRead is a global variable whose value, if set, is applied to the text or box form of every input expression before it is fed to Mathematica.

Introduction to Working with DSolve (Mathematica Tutorial)

The aim of these tutorials is to provide a self-contained working guide for solving different types of problems with DSolve. The first step in using DSolve is to set up the ...

ReinstallJava (JLink Symbol)

ReinstallJava[] is a convenience function that calls UninstallJava followed by InstallJava.

UseFrontEnd (JLink Symbol)

UseFrontEnd[expr] evaluates expr in an environment where the kernel can make use of the services of the notebook front end.

FixCRLF (NETLink Symbol)

FixCRLF["str"] changes the linefeeds in the given string to the CR/LF Windows convention.

ReinstallNET (NETLink Symbol)

ReinstallNET[] is a convenience function that calls UninstallNET[] and then InstallNET[].