$1$ : It means "there exists something"
$0$ : It doesnt mean "there exists nothing", instead it means "there exist something but that is nothing"
I dislike arrogant types. If you are one of such, please leave me alone.
Q&A for people studying math at any level and professionals in related fields
Q&A for users of Mathematica
Q&A for professional mathematicians
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Q&A for practitioners of the art and science of signal, image and video processing
Q&A for professional and enthusiast programmers
Q&A for active researchers, academics and students of physics