During these two centuries, the interest shown in the study of burning mirrors is an essential part of the comprehension of the development of catoptrics, anaclastics and dioptrics

The entelechy is the name given to our inner dynamic purpose. It is the seed of potential that nestles deep within us, containing the fractal image of who we really are and what we can become. The Greek philosopher Socrates first coined the term entelechy, and the great mystic [Pierre] Teilhard de Chardin brought it to public attention. […] The inner sense of purpose that is governed by the entelechy is the driving force behind our lives, helping us to blossom into the fullest expression of ourselves.

Over a perfect field, the separable polynomials are precisely the square-free polynomials.

On this train we put the coloureds to work.