Residue Definition Logarithmic Derivative Formula for Dirichlet $L$-Functions Analytic Number Theory Dirichlet Approximation Theorem Number Theory Fundamental Theorem of Arithmetic Primes Möbius Inversion Formula Analytic Number Theory Period Symmetry for Square Root Continued Fractions Number Theory No Repeated Roots for Iterated Lubin–Tate Series Local Fields Chord Formula for Adding Distinct Points on an Elliptic Curve Number Theory Bounds on Reduced Forms Elementary Number Theory Number Theory Area Analytic Number Theory Subarea