I. INTRODUCTION

II. DES Y3 DATA & SAMPLE SELECTION  
A. Data Collection & the Gold Selection  
B. Shape Catalog & Image Simulations  
C. Photometric Redshift Calibration  

III. COSMIC SHEAR MEASUREMENT  
A. Tomography  
B. Two-Point Estimator & Measurement  
C. Data Covariance Matrix  
D. Blinding  

IV. FIDUCIAL MODEL AND ANALYSIS CHOICES  
A. Sampling and Parameter Inference  
B. Modeling Cosmic Shear  
C. Nonlinear Power Spectrum  
D. Intrinsic Alignments  
E. Modeling Nuisance Parameters: Shear Bias & photo𝑧 Error  
F. Incorporating Shear Ratios  
G. Angular Scale Cuts  

V. MODEL ROBUSTNESS TESTS ON SYNTHETIC DATA  
A. Analytically Generated Data  
B. Mock Data from N-body Simulations  

VI. PARAMETER CONSTRAINTS  
A. Λ CDM  
B. 𝑤CDM  
C. Intrinsic Alignments  

VII. MODEL ROBUSTNESS TESTS ON REAL DATA  
A. Baryonic $P(k)$ & Neutrinos  
B. Intrinsic Alignments  

VIII. COMPARISON WITH EXTERNAL DATA  
A. External Data Sets  
B. Quantifying Tension  

IX. CONCLUSIONS