Neo-Nazism control" and are a social burden. Several neo-Nazi groups exist in Costa Rica. The first to receive attention was the Costa Rican National Socialist Party, which is now disbanded. Others include Costa Rican National Socialist Youth, Costa Rican National Socialist Alliance, New Social Order, Costa Rican National Socialist Resistance (which is Costa Rica's member of the World Union of National Socialists) and the Hiperborean Spear Society. The groups normally target Jewish-Costa Ricans, Afro-Costa Ricans, Communists, gay people and especially Nicaraguan and Colombian immigrants. The media has discovered the existence of an underground neo-Nazi group inside the police. After a series
Neo-Hookean solid the left Cauchy-Green deformation tensor is In this case formula_76. Hence, formula_77. Now, Hence the Cauchy stress is given by Using the relation for the Cauchy stress for an incompressible neo-Hookean material we get Thus neo-Hookean solid shows linear dependence of shear stresses upon shear deformation and quadratic dependence of the normal stress difference on the shear deformation. Note that the expressions for the Cauchy stress for a compressible and an incompressible neo-Hookean material in simple shear represent the same quantity and provide a means of determining the unknown pressure formula_27. Neo-Hookean solid A neo-Hookean solid is a hyperelastic material