Expo 67 pavilions Expo 67 pavilions The Expo 67 International and Universal Exposition featured 90 pavilions representing Man and His World, on a theme derived from , written by the famous French pilot Antoine de Saint-Exupéry. The exposition displayed many nations, corporations, industries, technologies, social themes, religions and designs, including the US pavilion, a geodesic dome designed by Buckminster Fuller. Expo 67 also featured Habitat 67, an urban modular housing complex designed by architect Moshe Safdie, whose units were purchased by private Montrealers after the fair was concluded, and is still occupied today. The most popular display of the exposition was the soaring
Geodesic deviation "geodesic". The "geodesic deviation equation" relates the Riemann curvature tensor to the relative acceleration of two neighboring geodesics. In differential geometry, the geodesic deviation equation is more commonly known as the Jacobi equation. To quantify geodesic deviation, one begins by setting up a family of closely spaced geodesics indexed by a continuous variable "s" and parametrized by an affine parameter τ. That is, for each fixed "s", the curve swept out by γ(τ) as τ varies is a geodesic. When considering the geodesic of a massive object, it is often convenient to choose τ to be the object's proper time.