Tally -- the class of all tally results

Types of tally :

• BettiTally -- the class of all Betti tallies
• Set -- the class of all sets

Functions and methods returning a tally :

• Tally ** Tally -- Cartesian product of tallies
• Tally + Tally -- union of tallies
• Tally - Tally -- difference of tallies
• Tally ^** ZZ -- Cartesian power of sets and tallies
• tally(VisibleList) -- tally the elements of a list, sequence, or array
• Command \ Tally, see VisibleList / Function -- apply a function to elements of a list
• Function \ Tally, see VisibleList / Function -- apply a function to elements of a list
• Tally / Command, see VisibleList / Function -- apply a function to elements of a list
• Tally / Function, see VisibleList / Function -- apply a function to elements of a list

Methods that use a tally :

• Tally ? Tally, see ? -- comparison operator
• elements(Tally), see elements -- list of elements
• product(Tally) -- product of elements
• sum(Tally) -- sum of elements
• Tally _ Thing -- get a count from a tally

For the programmer

The object Tally is a type, with ancestor classes HashTable < Thing.