Item

An Item is a single number (numeric Item) or string (literal Item). It is used to represent calculus elements like : -3 ; +4.5 ; 296 ; 'A' ; 'CD' ; 'x' ; 'b²' ; '-y³' but not elements like : -5x², which can be represented by a Product of two Items (-5 and 'x²') or by a Monomial.

[[memo_item.png]]

possible args for __init__()

fields

debugging info (picture)