1 “.... This concrete example furnishes motivation for the general theory of noncompact symmetric spaces, which...”

2 “... theory and probability, the book presents a concrete approach to abstract group theory through applied...”

3 “..., brain tumors, and so forth, as well as the mysteries of the nonphysical, but no less concrete, world...”

4 “... places an emphasis on motivation, concrete examples, history, and, above all, applications in mathematics...”