11. These authors used the criterion to determine the lower critical dimension of random field magnets. 12. In the fermion theories, the critical dimension was 10. 13. The dimension at which nonquadratic contributions begin to contribute is known as the critical dimension . 14. This dimension is called the upper critical dimension . 15. The non-critical string is not formulated with the critical dimension , but nonetheless has vanishing Weyl anomaly. 16. The space dimension where mean field theory becomes qualitatively incorrect is called the lower critical dimension . 17. "They've achieved a critical dimension in an industry where that's very important and under very favorable terms. 18. But wireless adds a critical dimension to the debate that Whinston claims changes it from theory into inevitability. 19. "They've achieved a critical dimension in an industry where that's very important and under very favorable terms ." 20. These criteria cover the critical dimensions .