Ishi (? - 1916) was claimed to be the last California Yahi Indian. He was discovered in 1911 in the foothills near Mt. Lassen. His story was popularized in a book by Theodora Kroeber[?], wife of A.L. Kroeber, who worked with Ishi.
... of the coefficients a, b and c, which are assumed to be real (but see below for generalizations) with a being non-zero. These solutions are also called the roots of th ...