The report concerns the thermolysis products obtained from Group IV derivatives of pentaborane of the general type R3M(IV)B5H8 (where R = H or CH3, and M(IV) = Si or Ge). Significant yields of CB5H9 are isolated from thermolysis of (CH3)3GeB5H8. Direct gas phase reaction of GeH4 with B5H9 produces 2-H3GeB5H8. (Author)
The report considers two classes of pushdown automata (pda), and the languages accepted by them. These pda accept their languages rapidly because they reread the input word a limited number of times, hence, such languages are particularly useful as programming languages. The first class, strong bounded backtrack pda, read input words from left to right, and jump from right to left (backtrack). The languages accepted by such automata will be ...
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