Mon (emblem) are not recognized by law. One of the best known examples of a "mon" serving as a corporate logo is that of Mitsubishi, a name meaning "three lozenges" (occasionally translated as "three buffalo nuts"), which are represented as rhombuses. Another example of corporate use is the logo for the famous soy sauce maker Kikkoman, which uses the family "mon" of the founder, and finally, the logo of music instrument/equipment and motorcycle builder Yamaha, which shows three tuning forks interlocked into the shape of a capital "Y" in reference to both their name and the origin of the company. Japanese mon
Regular tuning and temperament theorems of linear algebra that the rank of the regular tuning and the rank of its comma lattice must sum to . The regular tuning formed by the intervals of 12-tone equal temperament has rank 1. Its comma lattice, generated by the syntonic and ditonic commas, has rank 2. A regular tuning generated by the octave and a tempered perfect fifth whose size in octaves is irrational has rank 2. Its comma lattice, generated by the syntonic comma, has rank 1. The regular tuning formed by the intervals of schismic temperament and that formed by the intervals of Helmholtzian temperament