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Bradshaw's Conjecture 20 is false

At a = 17, b = 7, the nonsquarefree input 125 satisfies Bradshaw's commutation equation.

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THEOREM

A nonsquarefree commuting input

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Bradshaw's Conjecture 20 is falseBradshaw's Conjecture 20 isfalse
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0
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D5/S0
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Certificates
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D5/S0/Certificates/BradshawConjectureTwentyRefutation
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D5/S0/Certificates/BradshawConjectureTwentyRefutation.lean
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sha256:76a8db6a0f78609b1b9d4a959c8392f2752f2daaddc1930e046e34ce07d0f608
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b52262a023c4db9bb30a128ebfd80ea4ef4c1a53
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37a24ddf3b9983bdabf0acbfd9b32b06c35c28d3

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Dependency edges, status, and source coordinates come from the verified release and certified topology. Blueprint exposition is labeled separately. A fallback title carries no additional mathematical authority.