Non-commutative arithmetic circuits with division

@inproceedings{Hrubes2014NoncommutativeAC,
  title={Non-commutative arithmetic circuits with division},
  author={Pavel Hrubes and Avi Wigderson},
  booktitle={ITCS},
  year={2014}
}
We initiate the study of the complexity of arithmetic circuits with division gates over non-commuting variables. Such circuits and formulas compute <i>non-commutative</i> rational functions, which, despite their name, can no longer be expressed as ratios of polynomials. We prove some lower and upper bounds, completeness and simulation results, as follows. If <i>X</i> is <i>n</i> x <i>n</i> matrix consisting of <i>n</i><sup>2</sup> distinct mutually non-commuting variables, we show that: (<i>i… CONTINUE READING

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