In commutative algebra, a ring of mixed characteristic is a commutative ring having characteristic zero and having an ideal such that has positive characteristic.[1]
- ^ Bergman, George M.; Hausknecht, Adam O. (1996), Co-groups and co-rings in categories of associative rings, Mathematical Surveys and Monographs, vol. 45, American Mathematical Society, Providence, RI, p. 336, doi:10.1090/surv/045, ISBN 0-8218-0495-2, MR 1387111.