quasi-residual design
type: Concept
broader: symmetric 2-design
preferred label: طرح شبه‌باقیمانده @fa

Bruck-Ryser-Chowla theorem
type: Concept
broader: symmetric 2-design
preferred label: قضیه براک-رایزر-چولا @fa

symmetric 2-design
type: Concept
broader: 2-design
narrower: quasi-residual design
narrower: Bruck-Ryser-Chowla theorem
preferred label: 2-طرح متقارن @fa
related: symmetric block design
related: symmetric design

2-design
type: Concept
narrower: symmetric 2-design
preferred label: 2-طرح @fa

symmetric block design
type: Concept
preferred label: طرح بلوکی متقارن @fa
related: symmetric 2-design

symmetric design
type: Concept
preferred label: طرح متقارن @fa
related: symmetric 2-design