Links

Wikipedia articles you may find useful:

• Leonhard Euler
• Carl Friedrich Gauss
• Quadratic reciprocity
• Legendre symbol
• Jacobi symbol
• Gauss circle problem
• Johann Peter Gustav Lejeune Dirichlet
• Dirichlet's theorem on arithmetic progressions
• Dirichlet's divisor problem
• Georg Friedrich Bernhard Riemann
• Riemann zeta function
• Julius Wilhelm Richard Dedekind
• Dedekind eta function
• Srinivasa Iyengar Ramanujan
• The Ramanujan tau function
• Erich Hecke
• Modular Form