{"component":{"type":17,"accent_color":7315445,"components":[{"type":10,"content":"-# WikiRNG · Roll of 10/26/2026 · by [momomo](https://wikirng.com/u/momomo)"},{"type":10,"content":"## [Injective and projective model structure](https://wikirng.com/roll/9iHEw7JEZt)"},{"type":10,"content":">>> In higher category theory in mathematics, injective and projective model structures are special model structures on functor categories into a model category. Both model structures do not have to exist, but there are conditions guaranteeing their existence."},{"type":14,"divider":true,"spacing":1},{"type":10,"content":"### 🟦 Obscure · 141,727 SP\n-# Top 12%"},{"type":14,"divider":true,"spacing":1},{"type":10,"content":"🟦 ∑ **Problem Set** · Obscure · +49,666 SP\n-# Has 20+ math formulas.\n🟦 🧊 **Untouched** · Obscure · +28,833 SP\n-# Only one edit ever.\n🟦 🧪 **arXiv** · Obscure · +18,884 SP\n-# Links to arXiv.\n🟦 🧮 **Equation** · Obscure · +17,511 SP\n-# Has a math formula.\n🟦 🤫 **Silent Treatment** · Obscure · +10,881 SP\n-# Has no talk page.\n🟩 🔗 **And** · Notable · +6,757 SP\n-# The title has the word 'and'.\n-# +13 more badges"},{"type":14,"divider":true,"spacing":1},{"type":1,"components":[{"type":2,"style":5,"label":"View roll","url":"https://wikirng.com/roll/9iHEw7JEZt"},{"type":2,"style":5,"label":"Read on Wikipedia","url":"https://en.wikipedia.org/wiki/Injective_and_projective_model_structure"}]},{"type":10,"content":"-# Article text from Wikipedia, CC BY-SA 4.0"}]}}