The Ten-Per-Cent Solution which he described as a "fun nod". Further criticism came from the conservative Parents Television Council (PTC), which named "The Simpsons" the "Worst TV Show of the Week" because "The Ten-Per-Cent Solution" contains "content inappropriate for the Family Hour". The group wrote that the "frank sexual dialogue warranted a TV-14 rating, but the episode was rated TV-PG. Fox network executives surely know that almost nothing that comes out of Joan Rivers’ mouth is rated PG; but they chose to rate the program inappropriately anyway, thus blindsiding parents and children with crude content." PTC cited examples such as Annie saying that
Automatic sequence is a fixed point of φ—that is, if "w" = φ("w")—then "s" = τ("w") is a "k"-automatic sequence. This result is due to Cobham, and it is referred to in the literature as "Cobham's theorem". Conversely, every "k"-automatic sequence is obtainable in this way. Let "k" ≥ 2. The "k-kernel" of the sequence "s"("n") is the set of subsequences In most cases, the "k"-kernel of a sequence is infinite. However, if the "k"-kernel is finite, then the sequence "s"("n") is "k"-automatic. It follows that a "k"-automatic sequence is necessarily a sequence on a finite alphabet. Let "u"("n") be a sequence