Voice of Fire with striped T-shirts and ties that mimicked the painting. The 1996 book "Voices of Fire: Art Rage, Power, and the State", edited by Bruce Barber, Serge Guilbaut and John O'Brian, discusses the issues around the purchase of the painting. Commissioned for Expo 67, the International and Universal Exposition that took place in Montreal during Canada's 1967 centennial, "Voice of Fire" was part of the US pavilion organized by art critic and historian Alan Solomon. The exhibition, "American Painting Now" featured the work of twenty-two artists installed in the US Pavilion, a geodesic dome designed by engineer Buckminster Fuller. Explicitly oriented
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.