Our goal today: Assumption 3 is still pretty strong in the sense that it says that no circuit can guess f(x) much better than the trivial 1/2. We will show that it is implied by the seemingly much weaker assumption that there’s some function f such that no circuit can compute f(x) with probability 1− 1/nc for some constant c > 0. Assumption 4: ∃f ∈ E such that CC1−n−c(f) ≥ 2n . That is, for eve...

We give a simple example that there is no symbolic theory for exclusive or (XOR) that is computationally sound.

Introduction. Students' evaluation of teaching is a major concern in higher education. In this regard, during the past 30 years hundreds of papers have been published which because of various grounds from valid, reliable to useless, such papers cannot be easily summarized. The present study investigated for two purposes, first was to out line opinions of two groups of advocates and opposites a...

  Background: The sale of food by street vendors is an activity of economic, sanitary, and nutritional importance, but these foods can pose a high risk to the health of consumers in inadequate conditions of preparation and storage. The aim of this study was to investigate the preparation conditions and the hygienic-sanitary quality of food sold by street vendors in the vicinity of four campuse...