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Step * 1 1 1 1 1 of Lemma rng_times_over_minus


1. r : Rng
2. a : |r|
3. b : |r|
⊢ (0 * b) = 0 ∈ |r|
BY
{ BackThruLemma `rng_times_zero` THEN Auto }

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Latex:

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Latex:

1.  r  :  Rng
2.  a  :  |r|
3.  b  :  |r|
\mvdash{}  (0  *  b)  =  0


By

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Latex:
BackThruLemma  `rng\_times\_zero`  THEN  Auto

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