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Step * of Lemma strict4-bag-combine

strict4(λx,y,z,w. ⋃b∈x.y[b])
BY
{ (RepUR ``bag-combine bag-map bag-union`` 0 THEN Auto) }

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Latex:

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Latex:
strict4(\mlambda{}x,y,z,w.  \mcup{}b\mmember{}x.y[b])


By

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Latex:
(RepUR  ``bag-combine  bag-map  bag-union``  0  THEN  Auto)

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