Encyclopedia > Giulio Racah

  Article Content

Giulio Racah

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Penrose triangle

... it. The tribar can only exist as a 2-dimensional drawing, since it exploits the overlapping of parallel lines drawn in different perspectives. It appears as a solid ...