A short note on integer complexity

@article{Steinerberger2014ASN,
  title={A short note on integer complexity},
  author={Stefan Steinerberger},
  journal={Contributions Discret. Math.},
  year={2014},
  volume={9}
}
Building on an earlier approach by Isbell and Guy, this short note gives a new, constructive upper bound on the smallest number of 1's needed in conjunction with arbitrarily many +, *, and parentheses to write an integer n for generic integers n. 

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