Description: Lemma for psgnuni . Any nonempty representation of the identity can be incrementally transformed into a representation two shorter. (Contributed by Stefan O'Rear, 25-Aug-2015)
Ref | Expression | ||
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Hypotheses | psgnunilem3.g | |
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psgnunilem3.t | |
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psgnunilem3.d | |
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psgnunilem3.w1 | |
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psgnunilem3.l | |
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psgnunilem3.w2 | |
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psgnunilem3.w3 | |
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psgnunilem3.in | |
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Assertion | psgnunilem3 | |