FARZANEGI
درونشد
هموندی
Encyclopedia
Philosophy
Logic
Mathematics
Computing
Ontology
Persian Translator
Logic Lab
Hall of Fame
Library
Dictionary
About
Group
Abelian Group
دیسهای
∀𝑥,𝑦 𝑥+𝑦=𝑦+𝑥 <𝑖>(𝐶𝑜𝑚𝑚𝑢𝑡𝑎𝑡𝑖𝑣𝑖𝑡𝑦)𝑖>
∀x,y x+y=y+x
(Commutativity)