International Standard Name Identifier was published on 15 March 2012. The ISO technical committee 46, subcommittee 9 (TC 46/SC 9) is responsible for the development of the standard. 2013-09-01 "INTERNATIONAL STANDARD ISO 27729:2012 TECHNICAL CORRIGENDUM 1" was published. The FAQ of the isni.org websites states "An ISNI is made up of 16 digits, the last character being a check character." In display it is frequently shown with spaces. The ISNI allows a single identity (such as an author's pseudonym or the imprint used by a publisher) to be identified using a unique number. This unique number can then be linked to any of the
Kaprekar number for base "b" is then one which lies in the set "K"("b"), and a Kaprekar number for base "b" is one which lies in any one of the sets "K"("b"), "K"("b"), "K"("b"),…. 297 is a Kaprekar number for base 10, because 297 = 88209, which can be split into 88 and 209, and 88 + 209 = 297. By convention, the second part may start with the digit 0, but must be nonzero. For example, 999 is a Kaprekar number for base 10, because 999 = 998001, which can be split into 998 and 001, and 998 + 001 =