Clifford Spear Gardner (January 14, 1924 – September 25, 2013) was an American mathematician specializing in applied mathematics.
Gardner studied at Phillips Academy and Harvard, where he earned his baccalaureate in 1944.
In 1953 he earned a PhD from New York University, under the supervision of Fritz John.
In 1985 he won the Norbert Wiener Prize for his contributions to supersonic aerodynamics and plasma physics.
[2] They developed a systematic approach to solving many nonlinear partial differential equations in a way similar to Fourier analysis for linear PDEs.