Quadratic Residues Full Chapter | MSc Advanced Number Theory | Euler Criterion

🎯 MSc Advanced Number Theory Chapter 1 Full Lecture | Quadratic Residues Explained In this video, we cover Chapter 1: Quadratic Residues from MSc Advanced Number Theory. This lecture is for MSc Mathematics students of National University (Paper 313701) and all other universities (DU, RU, CU, JU). 📚 What you will learn in this video: ✅ What is Quadratic Residue & QNR? ✅ Euler's Criterion (Most Important Theorem) ✅ Least Residue & Absolute Least Residue ✅ Number of QR is (p-1)/2 ✅ Product Rules of QR ✅ Example Tables for mod 7, 11, 13 ✅ Important Formulas (Legendre Symbol, Gauss Lemma, Reciprocity Law) ✅ 6 Important Problems for Exam 📌 Timestamps: 0:00 Intro 0:45 Point 1 - What is Quadratic Residue? 2:30 Point 2 - Euler's Criterion (Important) 4:30 Point 3 - Least Residue & Absolute Least Residue 5:45 Point 4 - Number of QR Theorem 6:45 Point 5 - Product Rules 7:45 Point 6 - QR Table mod 7 & mod 11 8:45 Important Formulas - Screenshot This! 10:00 Important Problems - Practice These 11:00 Outro & Next Video 📄 Download PDF Notes & Posters: 👉 Facebook Page: Math R Solution [Your Page Link Add করো] 🔗 Next Video: Chapter 2 Legendre Symbol & Gauss Lemma (Coming Soon) If this video helps you, please LIKE, COMMENT, SHARE & SUBSCRIBE to Math R Solution for more MSc Math lectures. #MScMath #AdvancedNumberTheory #QuadraticResidues #EulersCriterion #LegendreSymbol #MathRSolution #MScFinalYear #NumberTheory #NationalUniversity #Mathematics