On this day, 122 years ago, on February 1, 1903 (January 4, 1903, the famous British physicist and mathematician Stokes passed away in Cambridge. Stokes G. Stokes G.G (1819-1903) British mechanic and mathematician. Born in Skrin on August 13, 1819, and died in Cambridge on February 1, 1903. He has been Lucasian Professor at Cambridge University since 1849. He was elected a member of the Royal Society in 1851. He served as Secretary of the Society since 1854. He was elected President of the Royal Society 30 years later. Stokes is the second person after I. Newton to hold three positions: Lucasian Professor, Secretary of the Royal Society, and President of the Royal Society. The main contribution is the study of the motion laws of viscous fluids. In 1821, the equation of motion with a constant reflecting viscosity was obtained. In 1845, Stokes started from switching to the mechanical model of continuous systems and Newton's physical laws on viscous fluids, and gave the basic equation set for the motion of viscous fluids in "On the Theory of Internal Friction of Fluids in Motion and the Theory of Balance and Motion of Elastomers"., which contains two constants. This set of equations is later called the Navier-Stokes equations, which is the most basic equation set in fluid mechanics. In 1851, Stokes proposed a formula for calculating the resistance encountered by a sphere when moving slowly in a viscous fluid in a research report "The Effect of Friction in a Fluid on the Motion of a Pendulum", stating that the resistance is proportional to the flow rate and the viscosity coefficient. This is the Stokes formula for resistance. Stokes discovered the nonlinear characteristics of surface waves in fluids, whose velocity depends on the amplitude, and used the perturbation method to deal with the nonlinear wave problem for the first time (1847). Stokes also studied elasticity. He pointed out that there are two basic resistance forces in isotropic elastic bodies, namely, resistance to volumetric compression and resistance to shear. He clearly introduced shear stiffness as compression stiffness (1845), proving that elastic longitudinal waves are non-rotational volumetric expansion waves, and elastic transverse waves are isovolumetric distortion waves (1849). Stokes is known mathematically for a conversion formula between line integral and area integral in field theory (Stokes formula).