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Hence when n = 1, R is an R-module, where the scalar multiplication is just ring multiplication. The case n = 0 yields the trivial R -module {0} consisting only of its identity element. Modules of this type are called free and if R has invariant basis number (e.g. any commutative ring or field) the number n is then the rank of the free module.
Ranma ½ (らんま 1 / 2 ) is a Japanese anime series adapted from the manga of the same name by Rumiko Takahashi. It was created by Studio Deen and aired weekly between April 15, 1989, and September 16, 1989, on Fuji TV before being canceled after 18 episodes due to low ratings.