NOT, NAND, NOR, and XNOR gates

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  Scott D  (Report)

  March 21, 2019 08:41 (Edited March 21, 2019 08:42)

  I think I found the answer.  dwavebinarycsp.Constraint.flip_variable() can be used to negate a variable.  See the exchange between Alex Condello and Joel Pasvolsky in the comments pertaining to dwavebinarycsp issue #45 on GitHub:

  https://github.com/dwavesystems/dwavebinarycsp/issues/45

  I see that flip_variable() is described in the Ocean SDK documentation:

  https://docs.ocean.dwavesys.com/projects/binarycsp/en/latest/reference/generated/dwavebinarycsp.Constraint.flip_variable.html

  I think it would be helpful to mention flip_variable() in the gates.py source code and in the documentation of and_gate(), or_gate(), and xor_gate().

  And if possible, it would be convenient if searching for NOT, NAND, NOR, or XNOR returned a pointer to flip_variable().

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  David J  (Report)

  March 21, 2019 16:33

  Hi Scott,

  That's a great suggestion!
  We have added your suggestion and referenced this post in the git hub issue:
  https://github.com/dwavesystems/dwavebinarycsp/issues/45

  As a side note, you too can post directly to git hub on issues that you think are important!

  Thank you for getting involved and giving us your input!

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  Scott D  (Report)

  March 22, 2019 06:47

  Thank you, David.

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