Takanori Nishikawa his name was a play on Nishikawa's pseudonym with that band (Haine). [Heine's first name is written as in katakana.] The surnames of both Nishikawa and Westenfluss mean "west river" in Japanese (西川) and German (Westenfluß), respectively. "Ignited"'s title is closely similar to the mobile suit (GOUF Ignited) that Nishikawa's "GSD" character piloted. "Vertical infinity" was released on January 26, 2005 by Epic and exactly six months later by Tofu Records. The infinity symbol (∞), when facing vertically or turned sideways, looks like the number 8. That is also the number of original studio albums Nishikawa has released to date
Kronecker symbol Kronecker symbol In number theory, the Kronecker symbol, written as formula_1 or formula_2, is a generalization of the Jacobi symbol to all integers formula_3. It was introduced by . Let formula_3 be a non-zero integer, with prime factorization where formula_6 is a unit (i.e., formula_7), and the formula_8 are primes. Let formula_9 be an integer. The Kronecker symbol formula_10 is defined by For odd formula_8, the number formula_13 is simply the usual Legendre symbol. This leaves the case when formula_14. We define formula_15 by Since it extends the Jacobi symbol, the quantity formula_17 is simply formula_18 when formula_19. When formula_20,