block intersection
type: Concept
preferred label: اشتراک بلوکی @fa
related: quasi-symmetric block design

block graph
type: Concept
preferred label: گراف بلوکی @fa
related: quasi-symmetric block design

quasi-symmetric block design
type: Concept
broader: block design
preferred label: طرح بلوکی شبه‌متقارن @fa
related: block intersection
related: symmetric block design
related: block graph

symmetric block design
type: Concept
preferred label: طرح بلوکی متقارن @fa
related: quasi-symmetric block design

block design
type: Concept
narrower: quasi-symmetric block design
preferred label: طرح بلوکی @fa