Time crystals can be classified as either discrete or continuous. An external periodic force drives discrete time crystals, while continuous time crystals emerge from the collective and self-sustained ...

Comprehensive introduction to analysis of continuous and discrete-time signals and systems. Linear time-invariant systems, convolution; Fourier series representations of periodic signals; Continuous ...

Design linear discrete-time systems and filters and analyze their behavior. Represent continuous-time signals and linear systems in discrete time, so that such signals can be recovered in continuous ...

It covers the solving of convolution integrals and differential equations, the transformation of signals to Fourier series, the Fourier and Laplace transforms, with their application, in continuous ...

The question of whether space and time are discrete or continuous, and whether there's a smallest possible length scale, is still unanswered.

A study of signals and linear systems and their applications in modern engineering. Representation of continuous and discrete time signals and systems in the time and frequency domains. Stability, ...

Theoretical physicists have proposed two types of time crystals, continuous and discrete, but it is only now that the first continuous time crystal has been made.

Scientists believe that time is continuous, not discrete -- roughly speaking, they believe that it does not progress in "chunks," but rather "flows," smoothly and continuously. So they often model ...

Two authors have recently published results concerning the relations between the discrete-time models of population growth and the continuous-time theory. In the present paper, the discrete-time ...