Nothing -- the empty class

Types of Nothing :

• InexactNumber'

Functions and methods returning an object of class Nothing :

• addCancelTask(Task,Task) -- specify that the completion of one task triggers the cancellation of another
• addDependencyTask(Task,Task) -- schedule a task, but ensure that it will not run until another task finishes
• addStartTask(Task,Task) -- schedule a task upon completion of another
• cancelTask(Task) -- stop a task
• "echoOff(File)" -- see echoOff -- turn off echoing
• "echoOn(File)" -- see echoOn -- turn on echoing
• "kill(File)" -- see kill -- kill a process
• kill(ZZ) -- kill a process
• linkFile(String,String) -- make a new link to a file
• "remove(Database,String)" -- see remove -- remove an entry from a mutable hash table, list, or database
• "remove(HashTable,Thing)" -- see remove -- remove an entry from a mutable hash table, list, or database
• "remove(MutableList,ZZ)" -- see remove -- remove an entry from a mutable hash table, list, or database
• "scan(BasicList,BasicList,Function)" -- see scan -- apply a function to each element in a list or sequence
• "scan(BasicList,Function)" -- see scan -- apply a function to each element in a list or sequence
• "scan(Thing,Function)" -- see scan -- apply a function to each element in a list or sequence
• "scan(ZZ,Function)" -- see scan -- apply a function to each element in a list or sequence
• "scanPairs(HashTable,Function)" -- see scanPairs -- apply a function to the pairs in a hash table

Methods that use an object of class Nothing :

• "Nothing == Nothing" -- see == -- equality
• "concatenate(Nothing)" -- see concatenate -- join strings
• "Nothing << Manipulator" -- see File << Thing -- print to a file
• "Nothing << Thing" -- see File << Thing -- print to a file
• "getWWW(String,Nothing)" -- see getWWW -- get a web page
• "inducedMap(Module,Nothing,Matrix)" -- see inducedMap(Module,Module,Matrix) -- compute the induced map
• "inducedMap(Nothing,Module,Matrix)" -- see inducedMap(Module,Module,Matrix) -- compute the induced map
• "inducedMap(Nothing,Nothing,Matrix)" -- see inducedMap(Module,Module,Matrix) -- compute the induced map
• "inducesWellDefinedMap(Module,Nothing,Matrix)" -- see inducesWellDefinedMap -- whether a map is well defined
• "inducesWellDefinedMap(Nothing,Module,Matrix)" -- see inducesWellDefinedMap -- whether a map is well defined
• "inducesWellDefinedMap(Nothing,Nothing,Matrix)" -- see inducesWellDefinedMap -- whether a map is well defined
• info(Nothing) (missing documentation)
• "locate(Nothing)" -- see locate -- locate source code
• "Manipulator Nothing" -- see Manipulator -- the class of all file manipulators
• "map(Module,Nothing,RingMap,List)" -- see map(Module,Module,RingMap,Matrix) -- homomorphism of modules over different rings
• "map(Module,Nothing,RingMap,Matrix)" -- see map(Module,Module,RingMap,Matrix) -- homomorphism of modules over different rings
• map(Module,Nothing,List) -- create a matrix by giving a doubly nested list of ring elements
• map(Module,Nothing,Matrix) -- recast a matrix to have a new target, and a free module as source
• "modulo(Matrix,Nothing)" -- see modulo(Matrix,Matrix) -- find the pre-image (pullback) of image of a map (low level version)
• "modulo(Nothing,Matrix)" -- see modulo(Matrix,Matrix) -- find the pre-image (pullback) of image of a map (low level version)
• "package(Nothing)" -- see package -- get containing package
• "part(Nothing,Nothing,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "part(Nothing,Nothing,VisibleList,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "part(Nothing,ZZ,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "part(Nothing,ZZ,VisibleList,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "part(ZZ,Nothing,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "part(ZZ,Nothing,VisibleList,RingElement)" -- see part -- select terms of a polynomial by degree(s) or weight(s)
• "sublists(VisibleList,Function,Function,Nothing)" -- see sublists -- process interspersed subsequences of a visible list
• "sublists(VisibleList,Function,Nothing)" -- see sublists -- process interspersed subsequences of a visible list
• "sublists(VisibleList,Function,Nothing,Function)" -- see sublists -- process interspersed subsequences of a visible list
• "sublists(VisibleList,Function,Nothing,Nothing)" -- see sublists -- process interspersed subsequences of a visible list
• "submatrix'(Matrix,Nothing,VisibleList)" -- see submatrix' -- exclude rows and/or columns of a matrix
• "submatrix'(Matrix,VisibleList,Nothing)" -- see submatrix' -- exclude rows and/or columns of a matrix
• "subquotient(Matrix,Nothing)" -- see subquotient -- make a subquotient module
• "subquotient(Module,Matrix,Nothing)" -- see subquotient -- make a subquotient module
• "subquotient(Module,Nothing,Matrix)" -- see subquotient -- make a subquotient module
• "subquotient(Module,Nothing,Nothing)" -- see subquotient -- make a subquotient module
• "subquotient(Nothing,Matrix)" -- see subquotient -- make a subquotient module
• "symmetricAlgebra(Nothing,Nothing,Matrix)" -- see symmetricAlgebra -- the symmetric algebra of a module
• "symmetricAlgebra(Nothing,Ring,Matrix)" -- see symmetricAlgebra -- the symmetric algebra of a module
• "symmetricAlgebra(Ring,Nothing,Matrix)" -- see symmetricAlgebra -- the symmetric algebra of a module
• urlEncode(Nothing) (missing documentation)

Fixed objects of class Nothing :

• null -- the unique member of the empty class

For the programmer

The object Nothing is a type, with ancestor class Thing.