of constructibility (see statements true in L). A note on typography Among mathematical adjectives derived from the proper name of a mathematician, the word "abelian" is rare in that it is often spelled with a lowercase a, rather than an uppercase A, the lack of capitalization being a tacit acknowledgment not only of the degree to which Abel's name has been institutionalized but also of how ubiquitous in modern mathematics are the concepts introduced by him. See also , the smallest non-abelian group Notes References Unabridged and unaltered republication of a work first published by the Cambridge University Press, Cambridge, England, in 1978. External links Abelian group theory Properties of groups Niels Henrik Abel