The Seldinger technique is the basic principle which underlies endovascular procedures. This proposition underlies the whole of his conceptual edifice, and is an unquestioned assumption. This model underlies the modern understanding of inheritance. This type of assumption underlies the variational Bayesian method. Logic is the foundation which underlies mathematical logic and the rest of mathematics. Fundamental Analysts are concerned with the company that underlies the stock itself. Spectral theory also underlies certain aspects of the Fourier transform of a function. It is this genetic variation that underlies differences in phenotype. Followers of Shaktism recognize Shakti as the power that underlies the male principle. Crossbridge cycling is a sequence of molecular events that underlies the sliding filament theory. An undercurrent of cynicism and futility underlies the entire series. Several scholars maintain that structural analysis indicates that an agglutinative language underlies the script. Esterath controls the Glory, the focal point of the Omniversal spectrum which underlies all existence. Other methods rely on the principle of large-margin learning that also underlies support vector machines. Pascal's principle underlies the operation of the hydraulic press.