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  a_a =: 1 + +
  a_b =: [ % +.

  py (a_b ` a_a @. has_gcd) y
I know it is math and all that, but when we commit something like this at day job, it doesn’t give you applause. Can the idea of the article be expressed in more readable/obvious form? Or is that an alphabet that you should learn first before solving that?

It’s a problem without solutions, when implementing from a mathematical definition.

Either you write it so it is “easy” to understand or you write it so it is easy to compare with the source equation.

Both have pros and cons.

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