There are three main types of mechanical switches: clicky, linear, and tactile. Here are examples and sound tests of a ...

Special offers on the produce we buy are one of the ways linear thinking breaks down in the real world (Credit: Getty Images) As we grow up we are trained to think about things in a linear way. But it ...

In this note we construct some counterexamples concerning upper semicontinuity and linear upper and lower semicontinuity of the solution sets and ε -solution sets of nonlinear programming programs: ...